Issue a Debit Note
When an invoice was too low — a price raised later, a rate or tax charged short — issue a debit note against it instead of a new invoice. It follows the invoice into GSTR-1 and e-invoice.
- Open the invoice and tap Debit Note.
- For each line: what it is for, HSN/SAC, the extra value before GST and the GST rate.
- Write the reason and tap Issue Debit Note — the customer owes that much more.
- Collect it with Payment In like any bill; cancel it from its page if it was a mistake.