how to turn off TWO-FACTOR AUTHENTICATIO

If you enabled two-factor authentication less than 14 day ago, you can turn it off using the link in the confirmation email.

If you've had it enabled for longer than 14 days, you cannot turn it off.

If you're having a problem with it, explain what it is and perhaps someone can help you figure it out.

See the Apple Support article(s) below.

Apple ID -Two-factor authentication.