Hello there, @Gail46. I can help you add user to you QuickBooks Online account.

You can add your IT company as a user to help you manage your business. Let me guide you through.

Here's how:
 

1. Sign in to QuickBooks with a user profile that has permission to manage users.
2. Go to the Gear icon, then Manage users.
3. Choose the user type you want to create.
4. Select the access rights for the user then select user settings, if applicable. Then select Next.
5. Enter the user’s name and email address. Then select Save.
    

For additional information you can refer to this article: Add and manage users in QuickBooks Online.

You can also check out this article for more information: Understanding user types and permissions.

If you have any other information or clarification on how to manage your account, let me know in the comment section. I'll be here to guide you. Have a good one and be safe!