Are you trying to update your business type? The QuickBooks Self-Employed is designed only to track your income and expense of your self-employment transactions. We're unable to setup business types in this version. You can read this articles for your reference:
I want to make sure you're able to access the Account and Settings section of QuickBooks Online.
If you're unable to see this area, it may be due to the type of user permissions you have or a browser issue. To rule out the browser issue, I recommend clearing the cache as an initial troubleshooting step. If the cache gets too full of older data, it can potentially cause viewing and performance errors within the system. Clearing it will get everything back to operating as normal. Here's how to get this done if you're using Chrome:
1. Click the three vertical dots in the top right corner.