We understand how challenging it is to be suddenly locked out of your company account, @johnX2222. We also appreciate the troubleshooting steps you've taken to resolve this concern.
Since you've already restarted your browser and used a different computer. I recommend contacting our Customer Live Support Team, who can help you restore your access.
- Click the (? Help) icon in your QuickBooks Online account in the top-right corner.
- Select Contact Us, then enter a short description of your concern.
- Choose Chat with us to start a live chat with an agent or request a callback for phone support.

You can also check our support hours to know our support availability time: Get help with QuickBooks products and services.
Let us know if you have further questions, we'll be right here to help you anytime.