I can imagine the hurdle you're facing right now, @jimlemire.

Let me route you to the right support to help you get past the multi-factor verification in QuickBooks Online.

Since following the steps given by my peers above didn't work, I recommend getting in touch with our live support. They can check further why you're verified every time you logged in even though the two-step authentication is disabled.

To accomplish this, you can follow the steps outlined by my peer @JenoP. Before you proceed, please review our support hours so they can assist you promptly.

Do you need more account management tips  in QuickBooks? You can visit our general resource page to get these details.

Comment back below if you have more account management concerns. I'm here to assist you always.