I'd like to add more information, Strachano.
Once you've purchased the software for three users, your employees can work at the same company file. You can visit our website to buy one.
Then, you can download and install the program.
Lastly, you can add an employee or user so they can work in QuickBooks.
I'll share the QuickBooks Desktop Mac 2020 User's Guide to help you.
Get back to this thread if you have more questions. We'd be happy to address them.