Please keep in mind that only users with the right permissions can manage user profiles in QuickBooks Online. If you need to, here's how to change the primary admin for your company.
Sign in to QuickBooks with a user profile that has permission to manage users.
Select the access rights for the user. Then select Next.
Select the user settings, if applicable. Then select Next.
Enter the user’s name and email address. Then select Save.
This sends the user an email invite to join your company. Ask them to click the link in the email. Then, they can create a new Intuit account or just sign in if they already have one.