Automatically apply an account credit to a subsequent invoice?

Hello there, tkryz82.

We have an available future that helps you apply the credit to invoices. I'll walk you through on how to turn on this feature. Here's how:
 

1. From the main menu, Click Edit.
2. Select Preferences and click Payments on the left side.
3. Go to the Company Preferences tab. Pu a check mark inside the Automatically apply payments box.
4. Then, OK.

Afterward, apply the credit to the invoice. In the Credit Memo, select the name of the customer, so the system will generate all the open invoices once you click the Use credit to apply to the invoice option above.

Please get back here if you have other questions. I'll be around to help you. I hope you're good. Thanks!