Phase F: Customer/Vendor Statements, Payment Terms Parser, Tax Rates

F1: GetCustomerStatementAsync/GetVendorStatementAsync on IFinancialReportService;
    StatementLineDto; CustomerStatementDto/VendorStatementDto; Statement action on
    CustomersController + VendorsController; Statement views + PDF download via
    StatementPdfHelper (QuestPDF); Statement button on Customer/Vendor Details pages.

F2: PaymentTermsParser static helper (CalculateDueDate, ParseEarlyPaymentDiscount);
    EarlyPaymentDiscountPercent/Days on Invoice entity; GetCustomerPaymentTerms AJAX
    endpoint on InvoicesController auto-populates Terms + due date on customer select;
    early payment discount notice on Invoice Create.

F3: TaxRate entity (Name/Rate/State/IsDefault/IsActive, tenant-filtered);
    IUnitOfWork.TaxRates + UnitOfWork + ApplicationDbContext; TaxRatesController
    (Index/Create/Edit/Delete/ToggleActive, CompanyAdminOnly); GetTaxRateForCustomer
    AJAX endpoint; Tax Rates in Settings gear menu.

Also fixes AddVendorCredits migration: VendorCreditApplications FKs changed from
CASCADE to NoAction to resolve SQL Server error 1785 (multiple cascade paths).
Migration: AddPaymentTermsAndTaxRates applied locally; 200/200 unit tests pass.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Web/Controllers/CustomersController.cs

@@ -26,6 +26,7 @@ public class CustomersController : Controller
     private readonly ISubscriptionService _subscriptionService;
     private readonly ITenantContext _tenantContext;
     private readonly UserManager<ApplicationUser> _userManager;
+    private readonly IFinancialReportService _financialReports;
 
     public CustomersController(
         IUnitOfWork unitOfWork,
@@ -34,7 +35,8 @@ public class CustomersController : Controller
         INotificationService notificationService,
         ISubscriptionService subscriptionService,
         ITenantContext tenantContext,
-        UserManager<ApplicationUser> userManager)
+        UserManager<ApplicationUser> userManager,
+        IFinancialReportService financialReports)
     {
         _unitOfWork = unitOfWork;
         _mapper = mapper;
@@ -43,6 +45,7 @@ public class CustomersController : Controller
         _subscriptionService = subscriptionService;
         _tenantContext = tenantContext;
         _userManager = userManager;
+        _financialReports = financialReports;
     }
 
     /// <summary>
@@ -935,6 +938,30 @@ public class CustomersController : Controller
         return RedirectToAction(nameof(Details), new { id });
     }
 
+    /// <summary>
+    /// Displays or downloads a dated activity statement for a customer.
+    /// Pass <c>pdf=true</c> to download the QuestPDF version; otherwise renders the HTML view.
+    /// </summary>
+    [HttpGet]
+    public async Task<IActionResult> Statement(int id, DateTime? from, DateTime? to, bool pdf = false)
+    {
+        var companyId = _tenantContext.GetCurrentCompanyId() ?? 0;
+        var fromDate  = from ?? new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1);
+        var toDate    = to   ?? DateTime.Today;
+
+        var dto = await _financialReports.GetCustomerStatementAsync(companyId, id, fromDate, toDate);
+
+        if (pdf)
+        {
+            var bytes = StatementPdfHelper.Generate(
+                dto.CustomerName, dto.CompanyName, dto.CustomerAddress,
+                dto.From, dto.To, dto.OpeningBalance, dto.Lines, dto.ClosingBalance, isVendor: false);
+            return File(bytes, "application/pdf", $"Statement-{dto.CustomerName}-{toDate:yyyyMMdd}.pdf");
+        }
+
+        return View(dto);
+    }
+
     /// <summary>
     /// Generates the next sequential credit memo number in CM-YYMM-#### format.
     /// Uses <c>ignoreQueryFilters: true</c> when scanning all existing memos so that

src/PowderCoating.Web/Controllers/InvoicesController.cs

@@ -1851,6 +1851,54 @@ public class InvoicesController : Controller
         return $"{prefix}{(maxNum + 1):D4}";
     }
 
+    /// <summary>
+    /// Returns the customer's payment terms, derived due date, and early-payment discount info
+    /// for the Invoice Create form so JavaScript can auto-populate those fields on customer selection.
+    /// </summary>
+    [HttpGet]
+    public async Task<IActionResult> GetCustomerPaymentTerms(int customerId)
+    {
+        var customer = await _unitOfWork.Customers.GetByIdAsync(customerId);
+        if (customer == null) return NotFound();
+
+        var invoiceDate = DateTime.Today;
+        var dueDate     = PaymentTermsParser.CalculateDueDate(customer.PaymentTerms, invoiceDate);
+        var (discountPercent, discountDays) = PaymentTermsParser.ParseEarlyPaymentDiscount(customer.PaymentTerms);
+
+        return Json(new
+        {
+            paymentTerms               = customer.PaymentTerms,
+            dueDate                    = dueDate?.ToString("yyyy-MM-dd"),
+            earlyPaymentDiscountPercent = discountPercent,
+            earlyPaymentDiscountDays   = discountDays,
+            isTaxExempt                = customer.IsTaxExempt
+        });
+    }
+
+    /// <summary>
+    /// Returns the default active tax rate for the current company, or zero for tax-exempt customers.
+    /// Called by the Invoice Create form when the customer selection changes.
+    /// </summary>
+    [HttpGet]
+    public async Task<IActionResult> GetTaxRateForCustomer(int customerId)
+    {
+        var companyId = _tenantContext.GetCurrentCompanyId() ?? 0;
+        var customer  = await _unitOfWork.Customers.GetByIdAsync(customerId);
+        if (customer == null) return NotFound();
+
+        if (customer.IsTaxExempt)
+            return Json(new { taxPercent = 0m, taxRateName = (string?)null });
+
+        var defaultRate = await _unitOfWork.TaxRates
+            .FirstOrDefaultAsync(r => r.IsDefault && r.IsActive && !r.IsDeleted);
+
+        return Json(new
+        {
+            taxPercent  = defaultRate?.Rate ?? 0m,
+            taxRateName = defaultRate?.Name
+        });
+    }
+
     /// <summary>
     /// Populates ViewBag data used by both Create GET and Create POST (on validation failure re-display):
     /// — Active customer list for the customer dropdown.

src/PowderCoating.Web/Controllers/TaxRatesController.cs

@@ -0,0 +1,139 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using PowderCoating.Core.Entities;
+using PowderCoating.Core.Interfaces;
+using PowderCoating.Shared.Constants;
+
+namespace PowderCoating.Web.Controllers;
+
+/// <summary>
+/// Manages named tax rates used to pre-fill the tax percent field on invoices when a taxable
+/// customer is selected. Only one rate may be marked as default at a time; that default is
+/// auto-applied via the GetTaxRateForCustomer AJAX endpoint on the Invoice Create form.
+/// </summary>
+[Authorize(Policy = AppConstants.Policies.CompanyAdminOnly)]
+public class TaxRatesController : Controller
+{
+    private readonly IUnitOfWork _unitOfWork;
+    private readonly ITenantContext _tenantContext;
+    private readonly ILogger<TaxRatesController> _logger;
+
+    public TaxRatesController(
+        IUnitOfWork unitOfWork,
+        ITenantContext tenantContext,
+        ILogger<TaxRatesController> logger)
+    {
+        _unitOfWork = unitOfWork;
+        _tenantContext = tenantContext;
+        _logger = logger;
+    }
+
+    /// <summary>Lists all tax rates for the current company.</summary>
+    public async Task<IActionResult> Index()
+    {
+        var rates = await _unitOfWork.TaxRates.GetAllAsync();
+        return View(rates.OrderBy(r => r.Name).ToList());
+    }
+
+    [HttpGet]
+    public IActionResult Create() => View(new TaxRate());
+
+    /// <summary>Creates a new tax rate. Enforces that only one rate is the default.</summary>
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    public async Task<IActionResult> Create(TaxRate model)
+    {
+        if (!ModelState.IsValid) return View(model);
+
+        if (model.IsDefault)
+            await ClearOtherDefaultsAsync(0);
+
+        await _unitOfWork.TaxRates.AddAsync(model);
+        await _unitOfWork.CompleteAsync();
+
+        TempData["Success"] = $"Tax rate \"{model.Name}\" created.";
+        return RedirectToAction(nameof(Index));
+    }
+
+    [HttpGet]
+    public async Task<IActionResult> Edit(int id)
+    {
+        var rate = await _unitOfWork.TaxRates.GetByIdAsync(id);
+        if (rate == null) return NotFound();
+        return View(rate);
+    }
+
+    /// <summary>Updates an existing tax rate. Clears default flag on other rates when IsDefault is set.</summary>
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    public async Task<IActionResult> Edit(int id, TaxRate model)
+    {
+        if (id != model.Id) return BadRequest();
+        if (!ModelState.IsValid) return View(model);
+
+        var rate = await _unitOfWork.TaxRates.GetByIdAsync(id);
+        if (rate == null) return NotFound();
+
+        if (model.IsDefault && !rate.IsDefault)
+            await ClearOtherDefaultsAsync(id);
+
+        rate.Name        = model.Name;
+        rate.Rate        = model.Rate;
+        rate.State       = model.State;
+        rate.Description = model.Description;
+        rate.IsDefault   = model.IsDefault;
+        rate.IsActive    = model.IsActive;
+
+        await _unitOfWork.CompleteAsync();
+
+        TempData["Success"] = $"Tax rate \"{rate.Name}\" updated.";
+        return RedirectToAction(nameof(Index));
+    }
+
+    /// <summary>Toggles IsActive without a full page reload.</summary>
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    public async Task<IActionResult> ToggleActive(int id)
+    {
+        var rate = await _unitOfWork.TaxRates.GetByIdAsync(id);
+        if (rate == null) return NotFound();
+
+        rate.IsActive = !rate.IsActive;
+        if (!rate.IsActive) rate.IsDefault = false;
+
+        await _unitOfWork.CompleteAsync();
+        return RedirectToAction(nameof(Index));
+    }
+
+    /// <summary>Soft-deletes a tax rate. Blocked when the rate is currently the default.</summary>
+    [HttpPost]
+    [ValidateAntiForgeryToken]
+    public async Task<IActionResult> Delete(int id)
+    {
+        var rate = await _unitOfWork.TaxRates.GetByIdAsync(id);
+        if (rate == null) return NotFound();
+
+        if (rate.IsDefault)
+        {
+            TempData["Error"] = "Cannot delete the default tax rate. Set another rate as default first.";
+            return RedirectToAction(nameof(Index));
+        }
+
+        await _unitOfWork.TaxRates.SoftDeleteAsync(id);
+        await _unitOfWork.CompleteAsync();
+
+        TempData["Success"] = $"Tax rate \"{rate.Name}\" deleted.";
+        return RedirectToAction(nameof(Index));
+    }
+
+    /// <summary>
+    /// Clears IsDefault on all rates except the one with <paramref name="exceptId"/>.
+    /// Called before saving a newly-designated default to enforce the single-default invariant.
+    /// </summary>
+    private async Task ClearOtherDefaultsAsync(int exceptId)
+    {
+        var others = await _unitOfWork.TaxRates.FindAsync(r => r.IsDefault && r.Id != exceptId);
+        foreach (var r in others)
+            r.IsDefault = false;
+    }
+}

src/PowderCoating.Web/Controllers/VendorsController.cs

@@ -7,9 +7,11 @@ using Microsoft.AspNetCore.Mvc.Rendering;
 using Microsoft.EntityFrameworkCore;
 using PowderCoating.Application.DTOs.Common;
 using PowderCoating.Application.DTOs.Vendor;
+using PowderCoating.Application.Interfaces;
 using PowderCoating.Core.Entities;
 using PowderCoating.Core.Enums;
 using PowderCoating.Core.Interfaces;
+using PowderCoating.Web.Helpers;
 
 namespace PowderCoating.Web.Controllers;
 
@@ -27,17 +29,23 @@ public class VendorsController : Controller
     private readonly IMapper _mapper;
     private readonly UserManager<ApplicationUser> _userManager;
     private readonly ILogger<VendorsController> _logger;
+    private readonly IFinancialReportService _financialReports;
+    private readonly ITenantContext _tenantContext;
 
     public VendorsController(
         IUnitOfWork unitOfWork,
         IMapper mapper,
         UserManager<ApplicationUser> userManager,
-        ILogger<VendorsController> logger)
+        ILogger<VendorsController> logger,
+        IFinancialReportService financialReports,
+        ITenantContext tenantContext)
     {
         _unitOfWork = unitOfWork;
         _mapper = mapper;
         _userManager = userManager;
         _logger = logger;
+        _financialReports = financialReports;
+        _tenantContext = tenantContext;
     }
 
     /// <summary>
@@ -377,6 +385,29 @@ public class VendorsController : Controller
 
     /// <summary>
     /// Populates <c>ViewBag.ExpenseAccounts</c> with active Expense, Cost of Goods, and Asset accounts
+    /// <summary>
+    /// Displays or downloads a dated activity statement for a vendor.
+    /// </summary>
+    [HttpGet]
+    public async Task<IActionResult> Statement(int id, DateTime? from, DateTime? to, bool pdf = false)
+    {
+        var companyId = _tenantContext.GetCurrentCompanyId() ?? 0;
+        var fromDate  = from ?? new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1);
+        var toDate    = to   ?? DateTime.Today;
+
+        var dto = await _financialReports.GetVendorStatementAsync(companyId, id, fromDate, toDate);
+
+        if (pdf)
+        {
+            var bytes = StatementPdfHelper.Generate(
+                dto.VendorName, dto.CompanyName, null,
+                dto.From, dto.To, dto.OpeningBalance, dto.Lines, dto.ClosingBalance, isVendor: true);
+            return File(bytes, "application/pdf", $"Statement-{dto.VendorName}-{toDate:yyyyMMdd}.pdf");
+        }
+
+        return View(dto);
+    }
+
     /// for the vendor's default expense account dropdown. All three account types are included because
     /// vendor bills can legitimately be coded to COGS (powder, materials) or asset accounts (equipment
     /// purchases) in addition to regular operating expenses. A "— None —" placeholder is prepended so

src/PowderCoating.Web/Helpers/PaymentTermsParser.cs

@@ -0,0 +1,49 @@
+using System.Text.RegularExpressions;
+
+namespace PowderCoating.Web.Helpers;
+
+/// <summary>
+/// Parses payment terms strings (e.g., "Net 30", "2/10 Net 30", "Due on Receipt")
+/// to compute due dates and extract early-payment discount terms.
+/// </summary>
+public static class PaymentTermsParser
+{
+    private static readonly Regex NetDaysRegex  = new(@"\bnet\s+(\d+)", RegexOptions.IgnoreCase | RegexOptions.Compiled);
+    private static readonly Regex EarlyDiscountRegex = new(@"(\d+(?:\.\d+)?)/(\d+)\s+net", RegexOptions.IgnoreCase | RegexOptions.Compiled);
+
+    /// <summary>
+    /// Returns the due date calculated from <paramref name="invoiceDate"/> and the supplied terms.
+    /// Returns null when the terms string cannot be parsed.
+    /// </summary>
+    public static DateTime? CalculateDueDate(string? terms, DateTime invoiceDate)
+    {
+        if (string.IsNullOrWhiteSpace(terms)) return null;
+
+        var normalized = terms.Trim().ToLowerInvariant();
+        if (Regex.IsMatch(normalized, @"\b(receipt|due\s*now|cod|immediate)\b"))
+            return invoiceDate;
+
+        var match = NetDaysRegex.Match(terms);
+        if (match.Success && int.TryParse(match.Groups[1].Value, out var days))
+            return invoiceDate.AddDays(days);
+
+        return null;
+    }
+
+    /// <summary>
+    /// Extracts early-payment discount terms from a string like "2/10 Net 30".
+    /// Returns (percent: 2, days: 10) for that example, or (0, 0) if not present.
+    /// </summary>
+    public static (decimal Percent, int Days) ParseEarlyPaymentDiscount(string? terms)
+    {
+        if (string.IsNullOrWhiteSpace(terms)) return (0, 0);
+
+        var match = EarlyDiscountRegex.Match(terms);
+        if (match.Success
+            && decimal.TryParse(match.Groups[1].Value, out var percent)
+            && int.TryParse(match.Groups[2].Value, out var days))
+            return (percent, days);
+
+        return (0, 0);
+    }
+}

src/PowderCoating.Web/Helpers/StatementPdfHelper.cs

@@ -0,0 +1,111 @@
+using PowderCoating.Application.DTOs.Accounting;
+using QuestPDF.Fluent;
+using QuestPDF.Helpers;
+using QuestPDF.Infrastructure;
+
+namespace PowderCoating.Web.Helpers;
+
+/// <summary>
+/// Generates a QuestPDF account-activity statement. Shared by customer and vendor statement actions.
+/// </summary>
+public static class StatementPdfHelper
+{
+    /// <summary>Generates and returns the raw PDF bytes for a statement.</summary>
+    public static byte[] Generate(
+        string entityName,
+        string companyName,
+        string? address,
+        DateTime from,
+        DateTime to,
+        decimal openingBalance,
+        List<StatementLineDto> lines,
+        decimal closingBalance,
+        bool isVendor)
+    {
+        var doc = Document.Create(container =>
+        {
+            container.Page(page =>
+            {
+                page.Margin(40);
+                page.Size(PageSizes.Letter);
+                page.DefaultTextStyle(t => t.FontSize(10));
+
+                page.Header().Element(h =>
+                {
+                    h.Column(col =>
+                    {
+                        col.Item().Text(companyName).Bold().FontSize(16);
+                        col.Item().Text($"{(isVendor ? "Vendor" : "Customer")} Statement").FontSize(12).FontColor("#555555");
+                        col.Item().Text($"Period: {from:MMM d, yyyy} – {to:MMM d, yyyy}");
+                        col.Item().PaddingTop(4).Text(entityName).Bold();
+                        if (!string.IsNullOrWhiteSpace(address))
+                            col.Item().Text(address).FontColor("#555555");
+                    });
+                });
+
+                page.Content().PaddingTop(16).Column(col =>
+                {
+                    col.Item().Table(t =>
+                    {
+                        t.ColumnsDefinition(c =>
+                        {
+                            c.ConstantColumn(72);   // Date
+                            c.RelativeColumn(2);    // Type / Ref
+                            c.RelativeColumn(3);    // Description
+                            c.ConstantColumn(80);   // Debit
+                            c.ConstantColumn(80);   // Credit
+                            c.ConstantColumn(90);   // Balance
+                        });
+
+                        static IContainer HeaderCell(IContainer c) =>
+                            c.Background("#2c3e50").PaddingVertical(4).PaddingHorizontal(6);
+
+                        t.Header(h =>
+                        {
+                            h.Cell().Element(HeaderCell).Text("Date").FontColor("white").Bold();
+                            h.Cell().Element(HeaderCell).Text("Type / Ref").FontColor("white").Bold();
+                            h.Cell().Element(HeaderCell).Text("Description").FontColor("white").Bold();
+                            h.Cell().Element(HeaderCell).AlignRight().Text("Debit").FontColor("white").Bold();
+                            h.Cell().Element(HeaderCell).AlignRight().Text("Credit").FontColor("white").Bold();
+                            h.Cell().Element(HeaderCell).AlignRight().Text("Balance").FontColor("white").Bold();
+                        });
+
+                        static IContainer DataCell(IContainer c) =>
+                            c.BorderBottom(0.5f).BorderColor("#dddddd").PaddingVertical(3).PaddingHorizontal(6);
+
+                        // Opening balance row
+                        t.Cell().Element(DataCell).Text(from.AddDays(-1).ToString("MM/dd/yy")).FontColor("#888888");
+                        t.Cell().Element(DataCell).Text("Opening Balance").Bold();
+                        t.Cell().Element(DataCell).Text("");
+                        t.Cell().Element(DataCell).Text("");
+                        t.Cell().Element(DataCell).Text("");
+                        t.Cell().Element(DataCell).AlignRight().Text(openingBalance.ToString("C"));
+
+                        foreach (var line in lines)
+                        {
+                            t.Cell().Element(DataCell).Text(line.Date.ToString("MM/dd/yy"));
+                            t.Cell().Element(DataCell).Text($"{line.Type}\n{line.Reference}");
+                            t.Cell().Element(DataCell).Text(line.Description);
+                            t.Cell().Element(DataCell).AlignRight().Text(line.Debit.HasValue ? line.Debit.Value.ToString("C") : "");
+                            t.Cell().Element(DataCell).AlignRight().Text(line.Credit.HasValue ? line.Credit.Value.ToString("C") : "");
+                            t.Cell().Element(DataCell).AlignRight().Text(line.RunningBalance.ToString("C"));
+                        }
+
+                        static IContainer TotalCell(IContainer c) =>
+                            c.Background("#f0f4f8").PaddingVertical(4).PaddingHorizontal(6);
+
+                        t.Cell().ColumnSpan(5).Element(TotalCell).Text("Closing Balance").Bold();
+                        t.Cell().Element(TotalCell).AlignRight().Text(closingBalance.ToString("C")).Bold();
+                    });
+                });
+
+                page.Footer().AlignCenter().Text(t =>
+                {
+                    t.Span($"Generated {DateTime.Now:MM/dd/yyyy HH:mm}").FontSize(8).FontColor("#888888");
+                });
+            });
+        });
+
+        return doc.GeneratePdf();
+    }
+}

src/PowderCoating.Web/Views/Customers/Details.cshtml

@@ -459,6 +459,9 @@
                             <a asp-action="Invoices" asp-route-id="@Model.Id" class="btn btn-outline-warning">
                                 <i class="bi bi-receipt me-2"></i>View Invoices
                             </a>
+                            <a asp-action="Statement" asp-route-id="@Model.Id" class="btn btn-outline-secondary">
+                                <i class="bi bi-journal-text me-2"></i>Statement
+                            </a>
                             <a asp-controller="Jobs" asp-action="Create" asp-route-customerId="@Model.Id" class="btn btn-outline-success">
                                 <i class="bi bi-plus-circle me-2"></i>New Job
                             </a>

src/PowderCoating.Web/Views/Customers/Statement.cshtml

@@ -0,0 +1,101 @@
+@model PowderCoating.Application.DTOs.Accounting.CustomerStatementDto
+@{
+    ViewData["Title"] = $"Statement – {Model.CustomerName}";
+}
+
+<div class="d-flex justify-content-between align-items-start mb-4 flex-wrap gap-2">
+    <div>
+        <h4 class="mb-0">Customer Statement</h4>
+        <p class="text-muted mb-0">@Model.CustomerName &nbsp;·&nbsp; @Model.From.ToString("MMM d, yyyy") – @Model.To.ToString("MMM d, yyyy")</p>
+    </div>
+    <div class="d-flex gap-2 flex-wrap">
+        <form method="get" class="d-flex gap-2 align-items-center">
+            <input type="hidden" name="id" value="@(ViewContext.RouteData.Values["id"])" />
+            <input type="date" name="from" class="form-control form-control-sm" value="@Model.From.ToString("yyyy-MM-dd")" />
+            <input type="date" name="to"   class="form-control form-control-sm" value="@Model.To.ToString("yyyy-MM-dd")" />
+            <button type="submit" class="btn btn-sm btn-outline-secondary">Refresh</button>
+        </form>
+        <a asp-action="Statement" asp-route-id="@(ViewContext.RouteData.Values["id"])"
+           asp-route-from="@Model.From.ToString("yyyy-MM-dd")"
+           asp-route-to="@Model.To.ToString("yyyy-MM-dd")"
+           asp-route-pdf="true"
+           class="btn btn-sm btn-outline-primary">
+            <i class="bi bi-file-earmark-pdf me-1"></i>Download PDF
+        </a>
+        <a asp-action="Details" asp-route-id="@(ViewContext.RouteData.Values["id"])" class="btn btn-sm btn-outline-secondary">
+            <i class="bi bi-arrow-left me-1"></i>Back
+        </a>
+    </div>
+</div>
+
+<div class="card border-0 shadow-sm">
+    <div class="card-header border-0 py-3 bg-white d-flex justify-content-between align-items-center">
+        <div>
+            <span class="fw-semibold">@Model.CustomerName</span>
+            @if (!string.IsNullOrWhiteSpace(Model.CustomerAddress))
+            {
+                <span class="text-muted small ms-2">@Model.CustomerAddress</span>
+            }
+        </div>
+        <div class="text-muted small">@Model.CompanyName</div>
+    </div>
+    <div class="card-body p-0">
+        <table class="table table-sm mb-0">
+            <thead class="table-dark">
+                <tr>
+                    <th style="width:100px">Date</th>
+                    <th style="width:120px">Type</th>
+                    <th style="width:130px">Reference</th>
+                    <th>Description</th>
+                    <th class="text-end" style="width:110px">Debit</th>
+                    <th class="text-end" style="width:110px">Credit</th>
+                    <th class="text-end" style="width:120px">Balance</th>
+                </tr>
+            </thead>
+            <tbody>
+                <!-- Opening balance -->
+                <tr class="table-light fw-semibold">
+                    <td class="text-muted">@Model.From.AddDays(-1).ToString("MM/dd/yy")</td>
+                    <td colspan="5">Opening Balance</td>
+                    <td class="text-end">@Model.OpeningBalance.ToString("C")</td>
+                </tr>
+
+                @if (!Model.Lines.Any())
+                {
+                    <tr>
+                        <td colspan="7" class="text-center text-muted py-4">No activity in this period.</td>
+                    </tr>
+                }
+                else
+                {
+                    @foreach (var line in Model.Lines)
+                    {
+                        <tr>
+                            <td class="text-muted small">@line.Date.ToString("MM/dd/yy")</td>
+                            <td>
+                                <span class="badge @(line.Type == "Invoice" ? "bg-primary" : line.Type == "Payment" ? "bg-success" : "bg-secondary") text-white">
+                                    @line.Type
+                                </span>
+                            </td>
+                            <td class="small">@line.Reference</td>
+                            <td class="small text-muted">@line.Description</td>
+                            <td class="text-end small">@(line.Debit.HasValue ? line.Debit.Value.ToString("C") : "")</td>
+                            <td class="text-end small">@(line.Credit.HasValue ? line.Credit.Value.ToString("C") : "")</td>
+                            <td class="text-end small @(line.RunningBalance > 0 ? "text-danger" : "text-success") fw-semibold">
+                                @line.RunningBalance.ToString("C")
+                            </td>
+                        </tr>
+                    }
+                }
+
+                <!-- Closing balance -->
+                <tr class="table-secondary fw-bold">
+                    <td colspan="6">Closing Balance</td>
+                    <td class="text-end @(Model.ClosingBalance > 0 ? "text-danger" : "text-success")">
+                        @Model.ClosingBalance.ToString("C")
+                    </td>
+                </tr>
+            </tbody>
+        </table>
+    </div>
+</div>

src/PowderCoating.Web/Views/Invoices/Create.cshtml

@@ -180,6 +180,7 @@
                                 </a>
                             </div>
                             <select asp-for="Terms" asp-items="ViewBag.PaymentTermsOptions" class="form-select"></select>
+                            <div id="earlyPaymentDiscountNotice" class="form-text text-success d-none"></div>
                         </div>
                     </div>
                 </div>
@@ -456,11 +457,52 @@
     function onCustomerChanged(select) {
         document.getElementById('hiddenCustomerId').value = select.value;
         const customerId = parseInt(select.value) || 0;
-        const taxField = document.getElementById('TaxPercent');
-        if (taxField) {
-            taxField.value = taxExemptCustomerIds.has(customerId) ? 0 : companyTaxPercent;
-            recalcTotals();
-        }
+        if (!customerId) return;
+
+        // Fetch payment terms + tax rate for the selected customer
+        fetch(`/Invoices/GetCustomerPaymentTerms?customerId=${customerId}`)
+            .then(r => r.ok ? r.json() : null)
+            .then(data => {
+                if (!data) return;
+                // Auto-fill Terms dropdown
+                const termsSelect = document.getElementById('Terms');
+                if (termsSelect && data.paymentTerms) {
+                    // Set the matching option, or fall back to the raw value
+                    const opt = Array.from(termsSelect.options).find(o => o.value === data.paymentTerms);
+                    if (opt) termsSelect.value = data.paymentTerms;
+                    // Trigger due date recalculation (invoice-due-date.js listens to 'change')
+                    termsSelect.dispatchEvent(new Event('change'));
+                }
+                // Show/hide early payment discount notice
+                const discountEl = document.getElementById('earlyPaymentDiscountNotice');
+                if (discountEl) {
+                    if (data.earlyPaymentDiscountPercent > 0) {
+                        discountEl.textContent = `${data.earlyPaymentDiscountPercent}% discount if paid within ${data.earlyPaymentDiscountDays} days`;
+                        discountEl.classList.remove('d-none');
+                    } else {
+                        discountEl.classList.add('d-none');
+                    }
+                }
+            }).catch(() => {});
+
+        // Fetch tax rate for the selected customer
+        fetch(`/Invoices/GetTaxRateForCustomer?customerId=${customerId}`)
+            .then(r => r.ok ? r.json() : null)
+            .then(data => {
+                if (!data) return;
+                const taxField = document.getElementById('TaxPercent');
+                if (taxField) {
+                    taxField.value = data.taxPercent ?? 0;
+                    recalcTotals();
+                }
+            }).catch(() => {
+                // Fall back to client-side tax exempt check
+                const taxField = document.getElementById('TaxPercent');
+                if (taxField) {
+                    taxField.value = taxExemptCustomerIds.has(customerId) ? 0 : companyTaxPercent;
+                    recalcTotals();
+                }
+            });
     }
 
     // ── Merchandise combobox ────────────────────────────────────────────────

src/PowderCoating.Web/Views/Shared/_Layout.cshtml

@@ -1516,6 +1516,7 @@
                                 {
                                     <li><a class="dropdown-item" asp-controller="CompanyUsers" asp-action="Index"><i class="bi bi-people-fill me-2"></i>Manage Users</a></li>
                                     <li><a class="dropdown-item" asp-controller="PricingTiers" asp-action="Index"><i class="bi bi-tags me-2"></i>Pricing Tiers</a></li>
+                                    <li><a class="dropdown-item" asp-controller="TaxRates" asp-action="Index"><i class="bi bi-percent me-2"></i>Tax Rates</a></li>
                                 }
                                 <li><hr class="dropdown-divider"></li>
                                 @if (gearIsAdmin)

src/PowderCoating.Web/Views/TaxRates/Create.cshtml

@@ -0,0 +1,63 @@
+@model PowderCoating.Core.Entities.TaxRate
+@{
+    ViewData["Title"] = "Add Tax Rate";
+}
+
+<div class="mb-4">
+    <h4 class="mb-0">Add Tax Rate</h4>
+    <p class="text-muted small mb-0">Define a named tax rate to auto-fill invoice tax percent by jurisdiction.</p>
+</div>
+
+<div class="card border-0 shadow-sm" style="max-width:600px">
+    <div class="card-body">
+        <form asp-action="Create" method="post">
+            @Html.AntiForgeryToken()
+            <div asp-validation-summary="ModelOnly" class="alert alert-danger mb-3"></div>
+
+            <div class="mb-3">
+                <label asp-for="Name" class="form-label fw-semibold">Name <span class="text-danger">*</span></label>
+                <input asp-for="Name" class="form-control" placeholder="e.g., CA Sales Tax" />
+                <span asp-validation-for="Name" class="text-danger small"></span>
+            </div>
+
+            <div class="row g-3 mb-3">
+                <div class="col-md-6">
+                    <label asp-for="Rate" class="form-label fw-semibold">Rate (%) <span class="text-danger">*</span></label>
+                    <div class="input-group">
+                        <input asp-for="Rate" type="number" step="0.0001" min="0" max="100" class="form-control" placeholder="8.25" />
+                        <span class="input-group-text">%</span>
+                    </div>
+                    <span asp-validation-for="Rate" class="text-danger small"></span>
+                </div>
+                <div class="col-md-6">
+                    <label asp-for="State" class="form-label fw-semibold">State</label>
+                    <input asp-for="State" class="form-control" placeholder="e.g., CA" maxlength="2" />
+                    <span asp-validation-for="State" class="text-danger small"></span>
+                </div>
+            </div>
+
+            <div class="mb-3">
+                <label asp-for="Description" class="form-label fw-semibold">Description</label>
+                <input asp-for="Description" class="form-control" placeholder="Optional notes" />
+            </div>
+
+            <div class="mb-3 form-check">
+                <input asp-for="IsDefault" class="form-check-input" type="checkbox" />
+                <label asp-for="IsDefault" class="form-check-label">
+                    Default rate
+                    <span class="text-muted small d-block">Automatically applied to new invoices for taxable customers.</span>
+                </label>
+            </div>
+
+            <div class="mb-4 form-check">
+                <input asp-for="IsActive" class="form-check-input" type="checkbox" checked />
+                <label asp-for="IsActive" class="form-check-label">Active</label>
+            </div>
+
+            <div class="d-flex gap-2">
+                <button type="submit" class="btn btn-primary">Save Tax Rate</button>
+                <a asp-action="Index" class="btn btn-outline-secondary">Cancel</a>
+            </div>
+        </form>
+    </div>
+</div>

src/PowderCoating.Web/Views/TaxRates/Edit.cshtml

@@ -0,0 +1,62 @@
+@model PowderCoating.Core.Entities.TaxRate
+@{
+    ViewData["Title"] = "Edit Tax Rate";
+}
+
+<div class="mb-4">
+    <h4 class="mb-0">Edit Tax Rate</h4>
+</div>
+
+<div class="card border-0 shadow-sm" style="max-width:600px">
+    <div class="card-body">
+        <form asp-action="Edit" asp-route-id="@Model.Id" method="post">
+            @Html.AntiForgeryToken()
+            <input type="hidden" asp-for="Id" />
+            <div asp-validation-summary="ModelOnly" class="alert alert-danger mb-3"></div>
+
+            <div class="mb-3">
+                <label asp-for="Name" class="form-label fw-semibold">Name <span class="text-danger">*</span></label>
+                <input asp-for="Name" class="form-control" />
+                <span asp-validation-for="Name" class="text-danger small"></span>
+            </div>
+
+            <div class="row g-3 mb-3">
+                <div class="col-md-6">
+                    <label asp-for="Rate" class="form-label fw-semibold">Rate (%) <span class="text-danger">*</span></label>
+                    <div class="input-group">
+                        <input asp-for="Rate" type="number" step="0.0001" min="0" max="100" class="form-control" />
+                        <span class="input-group-text">%</span>
+                    </div>
+                    <span asp-validation-for="Rate" class="text-danger small"></span>
+                </div>
+                <div class="col-md-6">
+                    <label asp-for="State" class="form-label fw-semibold">State</label>
+                    <input asp-for="State" class="form-control" maxlength="2" />
+                </div>
+            </div>
+
+            <div class="mb-3">
+                <label asp-for="Description" class="form-label fw-semibold">Description</label>
+                <input asp-for="Description" class="form-control" />
+            </div>
+
+            <div class="mb-3 form-check">
+                <input asp-for="IsDefault" class="form-check-input" type="checkbox" />
+                <label asp-for="IsDefault" class="form-check-label">
+                    Default rate
+                    <span class="text-muted small d-block">Automatically applied to new invoices for taxable customers.</span>
+                </label>
+            </div>
+
+            <div class="mb-4 form-check">
+                <input asp-for="IsActive" class="form-check-input" type="checkbox" />
+                <label asp-for="IsActive" class="form-check-label">Active</label>
+            </div>
+
+            <div class="d-flex gap-2">
+                <button type="submit" class="btn btn-primary">Save Changes</button>
+                <a asp-action="Index" class="btn btn-outline-secondary">Cancel</a>
+            </div>
+        </form>
+    </div>
+</div>

src/PowderCoating.Web/Views/TaxRates/Index.cshtml

@@ -0,0 +1,108 @@
+@model List<PowderCoating.Core.Entities.TaxRate>
+@{
+    ViewData["Title"] = "Tax Rates";
+}
+
+<div class="d-flex justify-content-between align-items-center mb-4">
+    <div>
+        <h4 class="mb-0">Tax Rates</h4>
+        <p class="text-muted mb-0 small">Named rates used to auto-fill invoice tax percent when a taxable customer is selected.</p>
+    </div>
+    <a asp-action="Create" class="btn btn-primary btn-sm">
+        <i class="bi bi-plus-circle me-1"></i>Add Tax Rate
+    </a>
+</div>
+
+@if (TempData["Success"] != null)
+{
+    <div class="alert alert-success alert-permanent alert-dismissible fade show" role="alert">
+        @TempData["Success"]
+        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+    </div>
+}
+@if (TempData["Error"] != null)
+{
+    <div class="alert alert-danger alert-permanent alert-dismissible fade show" role="alert">
+        @TempData["Error"]
+        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+    </div>
+}
+
+<div class="card border-0 shadow-sm">
+    <div class="card-body p-0">
+        @if (!Model.Any())
+        {
+            <div class="text-center py-5 text-muted">
+                <i class="bi bi-percent fs-1 d-block mb-3 opacity-25"></i>
+                <p class="mb-1">No tax rates defined yet.</p>
+                <p class="small">Add a rate and mark it as default to auto-populate tax on invoices.</p>
+                <a asp-action="Create" class="btn btn-primary btn-sm mt-2">
+                    <i class="bi bi-plus-circle me-1"></i>Add First Tax Rate
+                </a>
+            </div>
+        }
+        else
+        {
+            <table class="table table-hover mb-0">
+                <thead class="table-light">
+                    <tr>
+                        <th>Name</th>
+                        <th>Rate</th>
+                        <th>State</th>
+                        <th>Description</th>
+                        <th class="text-center">Default</th>
+                        <th class="text-center">Active</th>
+                        <th></th>
+                    </tr>
+                </thead>
+                <tbody>
+                    @foreach (var rate in Model)
+                    {
+                        <tr class="@(!rate.IsActive ? "opacity-50" : "")">
+                            <td>
+                                @rate.Name
+                                @if (rate.IsDefault)
+                                {
+                                    <span class="badge bg-success ms-1">Default</span>
+                                }
+                            </td>
+                            <td>@rate.Rate.ToString("0.##")%</td>
+                            <td>@(rate.State ?? "—")</td>
+                            <td class="text-muted small">@(rate.Description ?? "—")</td>
+                            <td class="text-center">
+                                @if (rate.IsDefault)
+                                {
+                                    <i class="bi bi-check-circle-fill text-success"></i>
+                                }
+                            </td>
+                            <td class="text-center">
+                                <form asp-action="ToggleActive" asp-route-id="@rate.Id" method="post" class="d-inline">
+                                    @Html.AntiForgeryToken()
+                                    <button type="submit" class="btn btn-sm btn-link p-0 border-0"
+                                            title="@(rate.IsActive ? "Deactivate" : "Activate")">
+                                        <i class="bi @(rate.IsActive ? "bi-toggle-on text-success fs-5" : "bi-toggle-off text-muted fs-5")"></i>
+                                    </button>
+                                </form>
+                            </td>
+                            <td class="text-end">
+                                <a asp-action="Edit" asp-route-id="@rate.Id" class="btn btn-sm btn-outline-secondary me-1">
+                                    <i class="bi bi-pencil"></i>
+                                </a>
+                                @if (!rate.IsDefault)
+                                {
+                                    <form asp-action="Delete" asp-route-id="@rate.Id" method="post" class="d-inline"
+                                          onsubmit="return confirm('Delete this tax rate?')">
+                                        @Html.AntiForgeryToken()
+                                        <button type="submit" class="btn btn-sm btn-outline-danger">
+                                            <i class="bi bi-trash"></i>
+                                        </button>
+                                    </form>
+                                }
+                            </td>
+                        </tr>
+                    }
+                </tbody>
+            </table>
+        }
+    </div>
+</div>

src/PowderCoating.Web/Views/Vendors/Details.cshtml

@@ -10,6 +10,9 @@
 <div class="row justify-content-center">
     <div class="col-lg-10">
         <div class="d-flex justify-content-end gap-2 mb-4">
+            <a asp-action="Statement" asp-route-id="@Model.Id" class="btn btn-outline-secondary">
+                <i class="bi bi-journal-text me-2"></i>Statement
+            </a>
             <a asp-action="Edit" asp-route-id="@Model.Id" class="btn btn-warning">
                 <i class="bi bi-pencil me-2"></i>Edit
             </a>

src/PowderCoating.Web/Views/Vendors/Statement.cshtml

@@ -0,0 +1,93 @@
+@model PowderCoating.Application.DTOs.Accounting.VendorStatementDto
+@{
+    ViewData["Title"] = $"Statement – {Model.VendorName}";
+}
+
+<div class="d-flex justify-content-between align-items-start mb-4 flex-wrap gap-2">
+    <div>
+        <h4 class="mb-0">Vendor Statement</h4>
+        <p class="text-muted mb-0">@Model.VendorName &nbsp;·&nbsp; @Model.From.ToString("MMM d, yyyy") – @Model.To.ToString("MMM d, yyyy")</p>
+    </div>
+    <div class="d-flex gap-2 flex-wrap">
+        <form method="get" class="d-flex gap-2 align-items-center">
+            <input type="hidden" name="id" value="@(ViewContext.RouteData.Values["id"])" />
+            <input type="date" name="from" class="form-control form-control-sm" value="@Model.From.ToString("yyyy-MM-dd")" />
+            <input type="date" name="to"   class="form-control form-control-sm" value="@Model.To.ToString("yyyy-MM-dd")" />
+            <button type="submit" class="btn btn-sm btn-outline-secondary">Refresh</button>
+        </form>
+        <a asp-action="Statement" asp-route-id="@(ViewContext.RouteData.Values["id"])"
+           asp-route-from="@Model.From.ToString("yyyy-MM-dd")"
+           asp-route-to="@Model.To.ToString("yyyy-MM-dd")"
+           asp-route-pdf="true"
+           class="btn btn-sm btn-outline-primary">
+            <i class="bi bi-file-earmark-pdf me-1"></i>Download PDF
+        </a>
+        <a asp-action="Details" asp-route-id="@(ViewContext.RouteData.Values["id"])" class="btn btn-sm btn-outline-secondary">
+            <i class="bi bi-arrow-left me-1"></i>Back
+        </a>
+    </div>
+</div>
+
+<div class="card border-0 shadow-sm">
+    <div class="card-header border-0 py-3 bg-white d-flex justify-content-between align-items-center">
+        <span class="fw-semibold">@Model.VendorName</span>
+        <div class="text-muted small">@Model.CompanyName</div>
+    </div>
+    <div class="card-body p-0">
+        <table class="table table-sm mb-0">
+            <thead class="table-dark">
+                <tr>
+                    <th style="width:100px">Date</th>
+                    <th style="width:120px">Type</th>
+                    <th style="width:130px">Reference</th>
+                    <th>Description</th>
+                    <th class="text-end" style="width:110px">Debit</th>
+                    <th class="text-end" style="width:110px">Credit</th>
+                    <th class="text-end" style="width:120px">Balance</th>
+                </tr>
+            </thead>
+            <tbody>
+                <tr class="table-light fw-semibold">
+                    <td class="text-muted">@Model.From.AddDays(-1).ToString("MM/dd/yy")</td>
+                    <td colspan="5">Opening Balance</td>
+                    <td class="text-end">@Model.OpeningBalance.ToString("C")</td>
+                </tr>
+
+                @if (!Model.Lines.Any())
+                {
+                    <tr>
+                        <td colspan="7" class="text-center text-muted py-4">No activity in this period.</td>
+                    </tr>
+                }
+                else
+                {
+                    @foreach (var line in Model.Lines)
+                    {
+                        <tr>
+                            <td class="text-muted small">@line.Date.ToString("MM/dd/yy")</td>
+                            <td>
+                                <span class="badge @(line.Type == "Bill" ? "bg-danger" : line.Type == "Payment" ? "bg-success" : "bg-secondary") text-white">
+                                    @line.Type
+                                </span>
+                            </td>
+                            <td class="small">@line.Reference</td>
+                            <td class="small text-muted">@line.Description</td>
+                            <td class="text-end small">@(line.Debit.HasValue ? line.Debit.Value.ToString("C") : "")</td>
+                            <td class="text-end small">@(line.Credit.HasValue ? line.Credit.Value.ToString("C") : "")</td>
+                            <td class="text-end small @(line.RunningBalance > 0 ? "text-danger" : "text-success") fw-semibold">
+                                @line.RunningBalance.ToString("C")
+                            </td>
+                        </tr>
+                    }
+                }
+
+                <tr class="table-secondary fw-bold">
+                    <td colspan="6">Closing Balance</td>
+                    <td class="text-end @(Model.ClosingBalance > 0 ? "text-danger" : "text-success")">
+                        @Model.ClosingBalance.ToString("C")
+                    </td>
+                </tr>
+            </tbody>
+        </table>
+    </div>
+</div>