remove two factor authentication

If your recently created your Apple ID you must have 2 factor authorization. If you had an older one and you added 2FA in the past 14 days you need to go back to the email you received from Apple and cancel it there. Otherwise as TheLittles said you cannot turn it off.

didthis Said

"remove two factor authentication"

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You Cannot Remove 2FA:

Once enabled, Two-Factor Authentication(2FA) cannot be removed(disabled).