Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
Log into your Microsoft account on this link.
https://account.microsoft.com/services/
You should find your subscription listed there, click the Manage button beside the subscription.
From there, you can cancel the subscription and also ensure you disable the recurring billing on the subscription.
You may then be entitled to a refund, you can check your eligibility to a refund using the steps on this link.
2
Before you cancel the subscription.
You will loose access to the 1TB of OneDrive storage that comes with the subscription, so if you exceed the free 5GB of OneDrive storage that comes with all Microsoft accounts, you need to ensure you have downloaded a safe copy of your files from OneDrive (https://onedrive.live.com/) to your PC to ensure against data loss.
You will also loose access to Copilot integration in your Office apps when you end the subscription.