If you have already used QuickBooks, you already know that both QuickBooks Pro and Premier versions have a limit in their data file when it comes to names. That means, both Premium and Pro versions of QuickBooks don’t allow you to exceed 14,500 names in the data file. Well, the term “name” represents a customer, an account, a vendor, an employee, an item or even other name. After reaching the limit of 14,500, you will have to upgrade your Pro or Premium version to Enterprise version. Otherwise, it doesn’t allow you to enter a single entry.