Learn how to close your AOL account and remove the email address. You can reactivate the account later if necessary

You cannot delete your email account without closing the entire AOL account, which means losing access to all AOL services, including AIM instant messaging. Additionally, your emails and address book are permanently deleted after 90 days; you cannot recover the account after 90 days. You can re-enable AOL and recover the address book if you log in with your AOL username and password.
https://www.webupro.com/how-to-delete-aol-account/