Cannot update credit card infrormation on site

How frustrating, @morkus.

I believe the best course of action will be for you to update this primary contact to the correct spelling so you can once again access this. Here's how:

1. Log in to your Customer Account Portal.
2. Select Request to become primary contact.
   1. 
3. Select the company you'd like to transfer.  Fill in the Reason for request and all required info.
4. Select Next and review all the info for accuracy.
5. Attach the requested documentation.
   1. The documentation requirements change on the type of business you select.
   2. 

We'll process your request within 3 business days.

You can reference this article as well: Change the Primary Contact for QuickBooks Desktop.

I'd love to hear how this goes! If you have additional questions on this, or anything else, I'm here to help! Take care.

When I logged into the portal, that button was not shown with that text.

In any case, I finally figured out how to get help from Intuit via the QB help menu and have gotten the issue resolved with Intuit's assistance.

I appreciate your kind reply. :)