Thank you for posting here in the Community, @bill-sommers.
Removing the credit card account used is just simple in QuickBooks Online (QBO). Let me show you how:
- Click on Banking at the left pane.
- Select Banking.
- Select the account you want to remove.
- Click the pencil icon at the upper-right side of the account.
- Click Edit account info.
- Put a check-mark on the box beside Disconnect this account on save.
- Click Save and Close to save the changes.
That would allow you to remove an account in QBO. Feel free to add a comment if you have any other questions. Have a good one!