Let me guide you on how you can issue checks to a single customer, CarlosPimaCounty.

Normally, as mentioned by @katherinejoyceO, the steps provided above are the best way on how you can issue a refund to your customer. You can also give a refund by following the steps below:

1. The checks are filled out automatically. Select OK.
2. Link the check to the overpayment. Go to the Customers menu and then select Receive Payments.
3. From the Received from the drop-down, select the Customer.
   Then, select the Discounts and Credits icon.
4. In the Available Credits section, select the check you created and then Done.
5. You may see a prompt to Confirm transfer. If you do, select Yes. The amount will be applied automatically to the invoice.
6. Select Save & Close.

Then, apply a credit to an invoice, here's how:

1. When you create the credit memo, make sure you select Customer: Job. This will open the Apply Credit to Invoice window.
2. Select the credit you want to apply automatically and select Done.

For your reference, you may check out these articles for more information:

• Track job costs in QuickBooks Desktop.
• Customize customer, job, and sales reports.

Please let me know how it goes or if I can be of additional assistance by leaving a comment. I'm always here to help you out.