Hi there,
Yes, you can turn off the credit card payment option through the invoice creation window.
Here's how:
- On the left menu, head to invoices.
- Create or open an invoice.
- Uncheck the Accept Credit Cards option.
- Click Save.

You can also enter the transaction manually if your customer wants to make a payment right now or already paid you. Feel free to read this article to learn more: Record or attach expense receipts in QuickBooks Self-Employed.
Feel free to drop a reply if you have additional concerns in QBSE. We're always ready to help.