For a direct Amazon membership, sign in to the correct Amazon marketplace and open the Prime membership-management area. Follow the current end membership / cancel renewal flow. Menu wording can change, so use the live account screen instead of an old sequence copied from a blog.
Before the final confirmation, record:
- membership type and billing frequency
- next billing or renewal date
- whether access ends immediately or at the end of the paid period
- any refund amount or refund eligibility Amazon displays
- the payment method receiving any refund