Hello there, WyrtWicce.
I'm here to help you with setting up your account.
The steps mentioned above in updating the company address are correct. We can perform some troubleshooting steps to resolve and see if this is a result of a browser error.
Let's start by using an incognito window. Log in from there and enter the details needed. Also, let's clear the cache on your browser since it can result in some errors in QuickBooks Online.
Aside from that, make sure that your browser is updated. Older versions is one of the reasons why we are experiencing issues.
I'm wishing you the best of luck and hope you'll pass the exam.
I'll be here if you need more help. Just tag my name.