It's a pleasure to have you here in the Community, @Gkt1!

If you have multiple companies subscribed to QuickBooks Online (QBO), each company file will require a separate paid subscription. However, you can access these company files using the same sign-in information. This allows you to switch between companies easily and manage everything more efficiently.

For further information, feel free to visit this article: Create or add another company file to QuickBooks Online.

In case you need help with adding, managing, or deleting user profiles, this article provides steps on how to do it: Add and manage users in QuickBooks Online.

If you have any further questions about managing multiple companies in QBO, please leave a reply. We're always ready to back you up.