Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello,
Sign in with your Microsoft account on the Services & Subscriptions page here.
https://account.microsoft.com/services
- Select your Office 365 Subscription, then click Manage.
- Select 'Cancel Subscription'.
- Scroll through the page and follow the instructions to proceed with the cancellation.
Once canceled within 30 days from the date of Purchase, you will receive a confirmation email, and the refund for the purchase will be credited to your original payment method within 3-5 working days.
For reference, see