It's our priority to have a streamlined process when handling your credentials within the program, unamused1.

I appreciate your troubleshooting efforts in resolving your concern. Since the error persists after performing the steps above, I suggest contacting our Live Support Experts. They have the tools to initiate a screen-sharing to check your account, determine the underlying cause of the error, and create an investigation case of this issue.

Here's how: 

1. On your QBO account, click on Help (?).
2. Select the Search tab, then click on Contact Us.
3. Enter the concern, then select Continue.
4. Click on Chat.

If you need to update your billing information in QuickBooks, you can check this article: Manage billing, payment, and subscription info in QuickBooks Online.

I/m always around to share appropriate information if you have further inquiries about login credentials in QuickBooks. Notify me by clicking the Reply button below or post in our forum again. We're available 24/7.