Note: QuickBooks Desktop Accountant is an industry-specific edition. That means you can have either QuickBooks Desktop Premier 2018 Retail or Premier 2018 Contractor, but not both. You can only install one industry-specific edition of QuickBooks Desktop for each version.
You can install the same version of QuickBooks Desktop Pro or Premier and Enterprise.You can't install the same version (year) of Pro and Premier on the same computer. QuickBooks Desktop Pro and Premier use the same install files.However, you can only open the same version (year) of Premier and Enterprise if you use the Accountant edition. If you're working in Premier 2019, you can also open Premier 2018. You can work in multiple versions of QuickBooks Desktop at the same time.Here are some important things to consider: If you need to reinstall or move QuickBooks Desktop to another computer, we’ll show you how you using the migrator tool. Use these specific steps to install each version or edition one at a time. You can have multiple versions (years) and editions (Pro, Premier, Enterprise) on the same computer. If you've used QuickBooks for a while, or you're an accountant with lots of QuickBooks clients, use newer and older versions of QuickBooks Desktop. Learn how to install multiple versions and editions of QuickBooks Desktop on one computer.