1. Click Reports button (at bottom).
2. Click the receipt that want to undo.
3. Click Undo button (Orange button).
4. The undo receipt will place under void receipt.
5. In dashboard, the receipt will go under Undo Department.
6. Change the customer table.
7. Finalize bill as usual.
8. After finalize bill, the slurp central will form a new receipt.