Hi there, hautecreations.

I'm pleased to hear that my colleague briefly explained to you about refunding a payment in QBO. Our team is committed to providing you with the best support possible, and I'm happy that we were able to assist you.

Furthermore, refer to this article to learn how to refund a customer in QBO: Record a customer refund in QuickBooks Online.

Let us know if you need further assistance managing your invoice in QuickBooks Online. I am here to help in any way I can. Stay safe.