Adding a user to your QuickBooks account allows many of us to work on the same file simultaneously. Limited-time users, like up to 3 users in QuickBooks Pro and up to 5 users in QuickBooks Premier, can view the same file simultaneously. If you need more, you may upgrade to QuickBooks Enterprise, which allows up to 30 users to figure on a company file simultaneously. To add a user license to QuickBooks desktop, read this article till the very end.