To clarify, are you referring to a refund for the customer's payments or a subscription refund? Any additional details can assist me in providing accurate information to help you solve your problem.
If it's a subscription refund, you can request a refund for QuickBooks products or a subscription if it's within (60) days of the date of purchase. Check this article to learn more about the return policy: QuickBooks Guarantee.
If you're referring to QuickBooks payments, you have six months from the date of sale to process the refund. After that, you can refund your customer in cash or by check. The steps to void or refund transactions are outlined below: