Hello there, megs. Before we dive in, could you please share the exact error message you're seeing on your screen when you try to make the update? This will help me pinpoint the issue and provide you with the most accurate resolution.
The reason for the inability to update the Legal Business Name is that only users with Admin access can make changes to the account.
Additionally, when E-Services is active, the system restricts changes to your Legal Business Name and CRA Business Number to prevent any mismatches with your CRA filing profile.
If you are the Admin and are still experiencing the issue, we recommend contacting our QuickBooks Online Payroll Support team directly. They have the specialized tools required to update these sensitive business details for you.
To reach them, navigate to Help (?) > click the Search bar > type contact Us > scroll down and click Contact Us > choose Callback.
Let us know if you have more questions or need further assistance.