If you don't see a Cancel link and you see a Turn on recurring billing link, recurring billing is turned off. Your trial will end on the Expires on date. You don't need to cancel because no future charges will be made.
You can cancel your Office 365 Home trial within 30 days of signing up and you won't be charged.
Sign in to the https://account.microsoft.com/services page using the Microsoft account that's associated with your Office 365 Home trial. We can help if you can't remember the Microsoft account or password you use with Office.
If you see a Cancel link under Office 365 Home, select Cancel to cancel your trial.