Hi Larry Trotter,
Closing your account is irreversible. When you close your account, all personal data will be removed. You won't have access to your account, and you will no longer have access to the data associated with your account. Please review the following document, which contains instructions for deleting an unmanaged Microsoft Entra organization.
https://learn.microsoft.com/en-us/entra/identity/users/users-close-account
If you are still confused, please open a Microsoft Support Request.