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... (Budget: ₹12500 - ₹37500 INR, Jobs: .NET, Accounting, API Development, Application Performance Monitoring, Database Management, Desktop Application, Inventory Management, Project Management, Software Development, Web Development)