Created a new AWS account under AWS Organizations with a typo in the email - how do I fix this?

With that it seems you will not have access to any emails due to incorrect email address. You may have to contact customer service for guidance. You may have to use https://support.aws.amazon.com/#/contacts/aws-account-support/ this to submit your request with required details.

You can close the account from AWS Organization Console.

For details, please refers to https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_accounts_close.html