In each version of QuickBooks Desktop, you can purchase licenses for different numbers of users:
To determine how many licenses you have:
If you need additional licenses to meet your business needs or have questions about pricing available to you. and follow the steps below.
Note: When adding a new user to a QuickBooks Desktop file, you might see this message:
Add this user to my QuickBooks license
This just means that you can add another seat to your QuickBooks Desktop license at this point, if you need to. It does not add a specific user to your QuickBooks Desktop license.
User license seats or the number of separate licenses determine how many users can access the file simultaneously, but it does not specify which users can access the file. To assign a license to a user, you must install QuickBooks with that license on that person's computer.
Learn more about QuickBooks license requirements, what a license seat is, and the like.