Welcome to the QuickBooks Community, Stephen.
Before anything else, can you share further details about where you encountered this error specifically? Are you encountering the Access Denied error while performing a specific action or while logging into your account?
If you're trying to perform a specific task, ensure that you have the necessary user permissions. Restricted access can prevent you from viewing sensitive information or making changes.
Alternatively, if you see this error when logging into your account, I recommend contacting our live support team directly. They can investigate the issue and help you resolve it quickly so you can get back to work.
If this is not the case, kindly share more details in the comments below so we can assist you further.
As always, the Community and I are here to help.