How to reverse a declined credit card payment

You've reached the right place for help, nelser.

Let me help you handle declined payments for paid invoices in QuickBooks Online (QBO).

Since the invoice was already paid, you can remove the payment record from it. I'll show you how to do it below:

1. Open the invoice.
2. On your keyboard, hold down the Ctrl and H keys. This will display the historical transactions it's connected to.
3. Double-click the transaction to open it, then delete it.
4. Return to your invoice and click Save and close.

You can also check this article to learn about the common reasons why transactions are being declined and the actions that need to be taken to resolve it: Transaction Result Codes article.

I'm adding the following resources about processing payments for your reference:

• Fix customer's declined credit card payments
• Manage declined credit card payment due to invalid zip code error

Be sure to get back to me if you have additional questions while handling declined payments. It would be my pleasure to help. Have a good one!