This project is under active development. Features are being added regularly. Contributions, feedback, and ideas are welcome!

A desktop accounting application modeled after QuickBooks Desktop Enterprise, built from scratch with modern .NET technologies and clean architecture. It provides double-entry bookkeeping, customer/vendor management, invoicing, bill payments, banking, and financial reporting.

• Double-entry accounting engine with 11 transaction posting types
• 65+ seeded Chart of Accounts
• General Ledger with balanced debits and credits
• Journal entries with reversing/void support
• Fiscal year and period management
• Class and location tracking

• Customer Center with 3-panel layout
• Invoices, Estimates, Sales Receipts
• Receive Payments with application to open invoices
• Credit Memos
• AR Aging reports

• Vendor Center with 3-panel layout
• Bills, Purchase Orders, Vendor Credits
• Bill Payments with application to open bills
• AP Aging reports

• Write Checks, Make Deposits, Transfer Funds
• Bank Register view
• Bank Reconciliation

• Profit & Loss
• Balance Sheet
• Cash Flows
• Trial Balance
• General Ledger
• AR/AP Aging (Summary & Detail)
• Customer & Vendor Balance
• Open Invoices & Unpaid Bills
• Transaction List
• Deposit Detail

• Classic QuickBooks-style UI with menu bar and MDI tabs
• Sortable and filterable lists
• Soft delete (no data is permanently removed)
• Auto-generated transaction numbers
• Database auto-seeding with sample data

Clean Architecture with 4 layers. Dependencies flow inward only:

Domain (entities, enums)
  ← Application (interfaces, base ViewModels, DTOs)
    ← Infrastructure (EF Core, repositories, services)
      ← Presentation (WPF shell + 7 module projects)

13 projects organized as:

• Framework: .NET 8 + WPF
• MVVM: CommunityToolkit.Mvvm 8.2.2 (source generators)
• ORM: Entity Framework Core 8.0.11
• Database: SQL Server LocalDB
• Architecture: Clean Architecture + MVVM

• .NET 8 SDK
• SQL Server LocalDB (included with Visual Studio)

# Build the solution
dotnet build QuickBooksDesktop.slnx

# Run the application
dotnet run --project src/Presentation/QBD.WPF/QBD.WPF.csproj

# Run tests
dotnet test QuickBooksDesktop.slnx

The database is auto-created on first run with sample data (customers, vendors, items, chart of accounts, etc.).

• Employees module
• Inventory module
• Print/export invoices and reports to PDF
• Multi-currency support
• User roles and permissions
• Data import/export

This project is in active development and contributions are welcome! Here's how you can help:

• Report bugs — Open an issue with steps to reproduce
• Suggest features — Share your ideas in Discussions or open an issue
• Submit code — Pick an open issue or propose a change via pull request
• Improve docs — Fix typos, add examples, or improve the README
• Test the app — Try it out and report what works and what doesn't

1. Fork the repository
2. Create a feature branch (git checkout -b feature/your-feature)
3. Make your changes
4. Run the tests (dotnet test QuickBooksDesktop.slnx)
5. Commit your changes (git commit -m "Add your feature")
6. Push to your fork (git push origin feature/your-feature)
7. Open a Pull Request

Look for issues labeled good first issue — these are great starting points for new contributors.

This project is open source. See LICENSE for details.