Premier is designed for businesses, entrepreneurs, and independent contractors with experienced in-house bookkeepers. Meanwhile, QuickBooks Accountant Desktop is tailored to independent bookkeepers and accountants who manage the accounts of multiple clients, each of whom may be in a specialized industry
QuickBooks Desktop Premier lets 5 users work in the same company file. QuickBooks Desktop Pro lets 3 users work in the same company file. If you need more than 5 users, check out QuickBooks Desktop Enterprise Solutions. You can have up to 30 users working on the same company file at the same time