I think I have duplicated an invoice payment and then recorded as a sales reciept

Good day, lorraine10,

You can open the customer profile and check if you made a duplicate payment. Then, delete the sales receipt to ensure you only have one payment record in QuickBooks

Let me show you how:

1. Select Sales from the left-hand menu, then choose Customers.
2. Click the customer name to open the profile.
3. Go to the Transaction List tab.
4. Locate the sales receipt.
5. Click the arrow next to Print, then choose Delete.
   

Check out this article for additional information on how to handle customer transactions: Record invoice payments in QuickBooks Online.

Let me know if you have follow-up questions by commenting below. I'm always right here to help.