Thanks for sharing detailed information about refunding your customer for a double payment of their invoices, @dawndyoung. Allow me to step in and help you record this in QuickBooks Online (QBO).

If a customer requests a refund for a double payment, I can show you how to record refunds to ensure your books are up-to-date. Here's how:

1. Go to + New and click Expense.
2. Enter the customer name in the Payee field.
3. In the Payment account field, select the bank to which you deposited the duplicate payment.
4. On the first line of the Category column, select Accounts Receivable.
5. In the Amount field, enter the amount of the refund.
6. Fill out other necessary information as you see fit, and click Save and close.

Next, let's link the refund to the customer's credit or overpayment:

1. Go to + New and select Receive payment.
2. Select the same customer and fill out other fields.
3. Under the Outstanding Transaction section, check the box for the Expense or Check you created when recording the refund.
4. Once done, select Save and Close.

For more information, please refer to this article: Record a customer refund in QuickBooks Online.

In QBO, we can run financial reports as a summary of information from different aspects of your business. They focus on your company's sales, expenses, and other relevant details.

Please get in touch with us here if there's anything else you need about refunds and double payments, I'm determined to ensure your success. Cheers to a safe and productive week ahead!