Hello there, @Chuchz.

I'm here to help you in fixing it.

After pulling up the A/R Aging Summary report, we'll have to click the amount in the Open Balance column to view the invoice affecting this balance. From there we'll have to manually edit the amount of the invoice to zero out the balance.

Here's how:

1. Go to the Reports menu.
2. Hover over Customers & Receivables, then click A/R Aging Summary.
3. Look at the amount balance from the report and then click on it.
4. Find the transaction cause the balance.
5. Select the invoice amount.
6. From the invoice window, edit the amount.
7. Once done, click Save & Close.

Feel free to browse this link about customizing reports in QuickBooks Desktop: Customize reports.

Let me know if you have other questions about QuickBooks. I'll be right here to help you out. Have a great day!