How to upgrade Office 365 Personal to Home edition so you can use it on more devices

[Windows Central]

You can quickly and easily upgrade your Office 365 subscription from Personal to Home.
Office 365 is a great way to access Microsoft's suite of office tools on a subscription basis. It ensures you won't be left in the dust when a new version of the product comes out — your Office is going to be kept up to date as long as you're a subscriber.
Did you start with Office 365 Personal but now need Office on multiple computers, tablets, and phones? No problem. Upgrading from Personal to Home won't take long.

Full story from the WindowsCentral blog...