Your account page is on Office.com. Just sign in, click the arrow next to your name, and then click My Account.
What’s on my account page?
If you have an Office 365 Personal or Office 365 Home subscription, you’ll see a list of all the computers and Windows tablets where Office is installed. You can also install Office, manage your installs, view your billing history, edit your payment methods, and access services like Skype and OneDrive that are included with your subscription.
If you have an Office 365 Home subscription, you can use your account page to invite people to share your subscription and manage Office installs for yourself and everyone you’re sharing with.
If you’re sharing someone’s subscription, you’ll get your own account page where you can install Office, see the list of your own computers where Office is installed, manage your installs, and access your OneDrive account.