Windows GST Billing & Inventory Accounting

I want a native Windows and Web base desktop application that merges GST-compliant billing, live inventory control, and full accounting into one smooth workflow. The focus is on reliability and speed for everyday shop floor or back-office use, so a lightweight installer that runs on Windows 10/11 without extra dependencies is ideal.

Essential features
• GST Billing – automatic tax calculations, HSN/SAC support, and printable invoices in the latest government format
• Inventory Management – item masters, batch/expiry handling, low-stock alerts, and purchase order tracking
• Accounting – double-entry ledger, cash/bank books, and basic financial statements that reconcile seamlessly with the sales and purchase data

Please send a detailed project proposal outlining:
• The development stack you recommend (e.g., .NET, Electron, or another Windows-friendly framework)
• Key milestones with the functionality you will deliver at each stage
• Any similar work you have completed and how it relates to this project
• Post-deployment support and update strategy, especially for future GST rule changes

I will evaluate proposals on clarity of approach, relevant past experience, and the practicality of your timeline. Looking forward to seeing how you would bring this all-in-one Windows solution to life.