How do I input a return receipt after a job is completed for a customer and I have extra materials that are return to the store?

Good morning, mike_marny-hotma.

Thanks for taking the time to join us here in the QuickBooks Community. I'd be happy to help.

QuickBooks Online provides the option to record a customer/supplier refund when you need to. I recommend reviewing this article as it provides detailed information as well as step by step instructions on how to proceed. 

If you have any other questions, feel free to reach back out here.