AppSaaz Automated GST Invoice

This app automatically generates GST-compliant tax invoices for every order placed in your Shopify store. It calculates the correct CGST+SGST or IGST split based on shipping locations, working out tax independently rather than copying Shopify's tax lines. When refunds or order edits occur, the app raises credit notes and debit notes automatically to maintain GST compliance, since tax invoices cannot be legally modified after issue. At month end, download GSTR-1 and GSTR-3B filing exports in JSON format compatible with the government's offline tool, plus complete working documents for your chartered accountant. The app supports sequential document numbering in your financial year format, per-product HSN/SAC codes, and flexible GST rates including slab-based pricing.