You'll have to delete your refund receipt and replace it with a credit memo, @ametz1201. Let me provide further clarification below.

Since your customer has no open balance, you'll have to use a credit memo rather than creating another refund receipt. This approach will ensure that the date and other relevant details are recorded accurately.

In addition, this adjustment will allow you to properly link the check refund and settle your outstanding balance. It's also important to note that you can only issue a check if the customer has available credit.

Here's how to enter a credit memo:

1. Go to + New and select Credit memo.
2. In the Customer field, choose the appropriate customer.
3. Enter the Credit Memo Date, Amount, Tax, and Product/Service (This is the category, product, or service you’re getting a credit for). 
4. Click Save and close. 

Next, you'll have to create a receive payment to link your credit memo and the existing check. Follow these steps:

1. Go back to the + New button and hit Receive payment. 
2. Add the Customer and pick the Payment method and Deposit to.
3. The balance should be 0 as they will cancel each other out.
4. Hit  Save and close.

For more detailed information, please see the Customer Refund if invoice has been paid section in this article: Record a customer refund.

Once everything is all set, I suggest generating the Transaction List by Customer report. This will help you efficiently track and analyze income and expenses by customer, enabling better financial management.

Please let me know if there's anything else I can assist you with your customer refund issue. I'll assist you in any way possible.