Hello, Amity.
Don't worry, I'm here to help you with the process of applying credits to an old invoice for QuickBooks Desktop for Mac. Here's how:
- Go to Customers.
- Choose Receive Payments.
- Select the customer on the Customer: Job ▼ dropdown.
- Click on the Apply Existing Credits. Checkbox.
- Press Save.
I've also added this article in case you want to learn how to write a refund check: Create and apply credit memos in QuickBooks for Mac.
Please let me know in the comment below if you have any more concerns. I'll be here if you need further assistance applying for credits. Have a nice day!
