Every return prints as an A4 note on your letterhead. A customer return prints as a Credit note and a return to a supplier as a Debit note, each with its own number series, CR-00001 and DN-00001 by default, set in Settings like your invoice numbers. The facts across the top give the note's number and date, the invoice or bill it reduces with that document's date, and the place of supply, or the supplier's own bill number on a debit note.
Below sit the customer or supplier with their address and GSTIN, the reason with any note you typed, and the credit as one amount with the GST inside it. The items table shows each line's SKU, HSN code, quantity, rate, taxable value, GST rate and amount, and marks goods that were written off. Under it come the amount in words, a GST summary by rate with CGST and SGST or IGST, how the money was settled, a short declaration and a signature line.
A debit note's declaration asks the supplier to issue their credit note for the amount, which is how a purchase return is adjusted under GST. Notes can be printed, downloaded or shared from a phone, and the file name carries the note number and the party's name.