GST and Invoices
GST Paperwork, Done for You
Every order gets the right GST document, ready for you and your accountant.



- GST tax invoices or bills of supply, made for every order
- Credit notes when an order is cancelled or refunded
- CGST and SGST, or IGST, by where the order goes
- GSTR-1 files and an invoice archive to export
- An HSN code finder that fills in the GST rate
Kosha is a demo store on Mercayo. Its products, orders and customers are sample data.
Every Feature in GST and Invoices
Each page explains what it does, how it works step by step, its settings and its limits today.
GST Invoices
Every order gets the right GST document, a tax invoice or a bill of supply, numbered without gaps per financial year, as a PDF for you and your shopper.
READ MORECredit Notes
When an invoiced order is cancelled, comes back undelivered or is refunded, Mercayo issues the GST credit note itself, once, for exactly what was taken back.
READ MORETax Settings
Set your registration type, state, GSTIN and legal name, choose whether prices include GST, and keep a rates table by HSN code that every bag and order uses.
READ MOREHSN Finder
Type what a product is, like phone case or silver earring, and pick its HSN code from the GST directory, with the rate from the official rate notifications.
READ MOREBusiness (B2B) Invoices
Business buyers add their GSTIN and legal name at checkout; the GSTIN is checked and the GST invoice names the business, ready for input tax credit.
READ MOREInvoices Screen and GSTR-1 Export
Orders → Invoices lists every invoice and credit note with its PDF, and EXPORT FOR GSTR-1 downloads the return's files for a month or a quarter.
READ MORE
In the Product

Kosha is a demo store on Mercayo. Its products, orders and customers are sample data.
Try It on Your Own Store
Every feature is in every plan, free for 14 days.