Thanks for joining the thread, @Ainara. I’d be glad to help you fix this issue with the error message you encounter when logging in to your company.
A QuickBooks Self-Employed company is a single-user subscription. It's the reason why you encountered the error message mentioned above. As for a QuickBooks Online company, user roles are customizable.
Check out these handy articles to learn more about user type permissions for QuickBooks Online:
I’m always ready to assist you if you have any other questions or concerns about managing your accounts. Tag me in your reply and I’ll sprint back into action. Have a good one and keep safe.
