Hello Arthataxac,
To apply a credit to an invoice, please follow these steps:
- Select the + New icon
- Select Receive Payment
- Select the customer's name
- Tick the box next to the invoice you wish to apply the credit to
- Tick the box next to the credit you wish to apply
- If the credit is the only payment you wish to apply, ensure that 'Amount Received' is $0
- Save your transaction
I hope this helps you apply your credit.
-Ken