I have a customer that paid an invoice by credit card and also set a direct debit. I want to refund the credit card payment. How do I do this?

Hi there, 

Welcome to the Community. QuickBooks is a flexible program that helps you to manage your accounting with ease. I'll be happy to share more info so you're on the right track. 

Recording your transactions the right way is essential for ensuring your books remain accurate. That said, I recommend consulting an accounting specialist for expert advice. This ensures your entries are recorded in a way that allows for you to navigate the program with peace of mind. You can get in touch with an accounting professional using this link here. Other accounting professionals are able to see this post in the Community and this will allow them to chime in. 

In the meantime, check out the following article that shows you how to: Void or refund customer payments in QuickBooks Online.

Let me know if this info helps. I'll be on standby.