Automated GST Billing & Inventory Excel

I need a single Excel workbook that lets me raise fully-compliant GST invoices while keeping my stock ledger accurate without any extra clicks. The flow I have in mind is simple: as soon as I enter or... (Budget: ₹1500 - ₹12500 INR, Jobs: Data Analysis, Data Entry, Excel, Financial Analysis, Inventory Management, PHP, Visual Basic, Visual Basic for Apps)