I'm thrilled to have you here today, @u00axe6.

In QBO, you can record a refund to your customer using a Check if they want you to reimburse an accidental overpayment. Also, please know that using a Check to handle a refund reduces your bank's balance and offsets the customer's open credit, overpayment, or prepayment.  To get you going, here's how:

1. Access your QuickBooks Online company.
2. On the left navigational bar, click the + New.
3. Select Check. If you're in Business view, follow the steps to switch to Accountant view first. Then come back to these steps.
4. Choose the customer you want to refund from the Payee ▼ dropdown.
5. From the Payment account ▼ dropdown, select the bank account where you deposited the overpayment to.
6. On the first line of the Category column, select Accounts Receivable.
7. Enter how much you want to refund in the Amount field.
8. Fill out the other fields as you see fit, then select Save and close.

For further guidelines, feel free to check this article: Record a customer refund in QuickBooks Online.

Additionally, I've got you this handy article to help you ensure data inside your company stays accurate: Run reports in QuickBooks Online.

@u00axe6, thanks for dropping by today. Feel free to post here again if you have any additional QuickBooks-related concern. I'll be here, ready to help you. Take care!