Hello there hammett03,
I'm here to help you record the transactions.
While we are unable to delete the sales receipt, you can create an invoice for the lacking amount. This way, the amount won't show as duplicate. Just click the Plus sign icon at the top and choose Invoice.
Feel free to visit this article for more details about credit card payments: Process a credit card payment.
That's it. If you've got more questions, don't hesitate to drop a comment below. I'll be here to help.