To delete a Microsoft Rewards account, you will need to follow these steps:
1. Go to the Microsoft Rewards website (https://account.microsoft.com/rewards) and sign in to your account.
2. Click on your profile picture in the top right corner and select "My Microsoft account."
3. Scroll down to the bottom of the page and click on "Close my account."
4. Read the information on the page and follow the prompts to confirm that you want to close your account.
5. You may be required to provide additional information or complete certain steps to close your account.
6. Once your account is closed, you will no longer be able to access your rewards or any other associated services.
It's important to note that closing your Microsoft Rewards account is permanent and cannot be undone. Make sure to redeem any remaining rewards or points before closing your account.