Returns and exchanges

1. Open Bills and find the bill.
2. Tap it, then Refund this order.
3. Pick what came back and how many, and give a reason.
4. Say whether it can be sold again: back on the shelf puts it back in stock; damaged or opened writes it off.

The money goes back the way the bill was paid: cash back from the drawer, UPI or card back to the customer, khata off their khata.

Exchanges

Take the return as above, then make a new bill for what the customer takes instead.