I'll provide you with an alternative way to refund your customer without encountering an error, @pallefly.
Please know that if the invoice has already been paid, you'll have to create a credit memo and a check affecting the accounts receivable. Then, link them through the Receive payment option.
Here's how:
- In the left side of your screen, click on Receive payment.
- Input the name of your customer.
- Then, it will automatically fill in your Credit memo and Check.
- Once done, hit Save and close.
Additionally, you may refer to the article Sales and Customers for further guidance. This resource offers links on managing company revenue and addressing customer-related issues.
If you need any help with processing a refund for your customer, please don't hesitate to reach out. I would be more than happy to assist you.