A refund for goods returned to you by the customer can be issued in the form of credit notes.
If you’ve enabled inventory tracking for your items in Zoho Books and raise a credit note towards an item returned by a customer, the stock level for this item will be adjusted accordingly.
When a customer partially or fully returns the goods you’ve supplied to him,
Now, the inventory of these returned goods is automatically updated in Zoho Books.
and GST filing.