Thanks for providing a screenshot and following the steps provided by my colleague @annmareepreston.

Aside from making sure that the Credit memo and the Check use Accounts Receivable as the account, you'll also need to ensure to associate and apply them to avoid having an open balance.

I'll walk you through how:

1. Go to the Customer menu then select Customer Center.
2. Choose a specific customer under the Customer and Jobs tab.
3. Open the Payment transaction then click on Discounts and Credits.
4. Check the amount to apply the credits under the Credits tab.
5. Click Done then Save and Close.
   
   

Once done, go back again to that customer then select All Sales Transactions under the Transactions tab and set the Filter by to All.

Hit View as Report under the Run Report drop-down. This will show you a zero amount for the Open Balance column.

That should do it!

I've also included articles to know more about how to give refunds or credit, manage checks and accounts receivable workflows in QuickBooks Desktop:

• Give refunds or credit for your customers.
• Create, modify and print checks.
• Accounts Receivable workflows .

Get back here again in the Community if you need further assistance. I'll be here to help. Take care and have a good one!