How do I delete my account?

Detailed advice on terminating resources you don't need any more is here https://repost.aws/knowledge-center/terminate-resources-account-closure

If you want to close your account the instructions are here https://docs.aws.amazon.com/accounts/latest/reference/manage-acct-closing.html#close-account-procedure

To close a standalone account from the Accounts page

1. Sign in to the AWS Management Console as the root user in the AWS account that you want to close. You can't close an account while signed in as an IAM user or role.
2. On the navigation bar in the upper-right corner, choose your account name or number, and then choose Account.
3. On the Account page, choose the Close account button.
4. Type your account ID (displayed at the top of the closure dialog box) to confirm that you have read and understand the account closure process.
5. Choose the Close account button to initiate the account closure process.
6. Within a few minutes, you should receive an email confirmation that your account has been closed.

Note that once you have closed your account, you cannot open a new account later using the same email address.