Are you referring to the payment methods when sending an invoice? If so, let me share the steps.
There are two ways on how to turn it off. The first method will affect all new invoices. Here's how:
Go to the Gear icon and select Account and settings.
From the Sales menu, click the Pencil (edit) icon.
Remove the checkmark on the Accept Credit Cards option.
Tap Save, then Done.
The second method only applies to the invoice you're going to send. When you create the invoice, click the Edit button on the Online payments section next to the Customer email field. Remove the checkmark on the Cards box, then OK.
Also, we've compiled the common articles to help you in using QuickBooks Payments. Check it here: QuickBooks Payments FAQ.
Do you have additional concerns? Leave a comment below and we'll assist you.