Thanks for your prompt reply, @Ballentine.

I'll add information to help you achieve your goal of refunding a payment in QuickBooks Online (QBO).

Yes, you're right. It would be best to edit the amounts or items if you need to issue a partial refund for the payment. Then, credit card refunds can only go back to the original card used. From there, you won't need to ask for the credit card information from your customer. Otherwise, you might need to reach out to your customer for verification.

I'll add this article again for more details: Void or refund customer payments in QuickBooks Online.

Also, this resource can give you insights about what fees you could be charged for a refund or voided payment: Understand fees for refunds or voided transactions.

Please don't hesitate to leave a comment below if you have more queries about refunds or any other transactions in QBO. I'll get back to this thread to help. Take care always.