Microsoft Support

Install Office on a different computer - support - Office.com
Learn how to remove Office so you can install it on another computer. You can install Office 365 Home Premium on up to five computers.
Deactivate an Office 365 Home Premium install - Access - Office.com
On your account page, you can deactivate an install of Office so you can use it on another computer.
Install Office on more than one computer - support - Office.com
Learn how to install Office 365 Home Premium on up to five computers.