CGST, SGST, or IGST on a GST invoice
When a GST invoice shows IGST, and when it splits the tax into CGST and SGST. A short guide for the Tallybolt GST invoice.
This describes how the Tallybolt invoice is filled in. It is general information, checked on 14 November 2026, and it is not tax advice. Rates and treatments change. Check the official guidance, or an accountant, before you rely on an invoice.
Same state: CGST and SGST
Compare your business state with the place of supply. When the two state codes match, the GST on each line is split into two equal parts. A line at 18% is shown as CGST 9% and SGST 9%. The taxable value is quantity times rate. GST is that value times the percent you enter for the line.
Another state: IGST
When the place of supply is a different state, the whole GST on the line is IGST. A line at 18% is shown as IGST 18%. A supplier in Maharashtra, state code 27, billing a customer in Karnataka, state code 29, is this case. The same supplier billing inside Maharashtra is CGST and SGST.
What to fill in
- Your business name, address, GSTIN, and state.
- The customer’s name and address, and their GSTIN when they have one.
- A sequential invoice number, the invoice date, and the place of supply.
- Each line’s description, HSN or SAC, quantity, rate, and GST percent.
- The total, which the preview also writes out in words.
Limits of this invoice
The percent is the one you type. The form does not look up the rate for an HSN or SAC, and it does not check that a GSTIN is valid. A union territory that charges UTGST is labelled SGST on the PDF when the place of supply matches your state. An extra label, such as a UPI id, is printed and is left out of the tax. The PDF has no IRN and it is not filed on the GST portal.