Two factor authentication

You can't turn off two factor after you have set it up.

You can rollback the first 2 weeks however. After that there is no way to go back.

Two-factor authentication for Apple ID - Apple Support

Can I turn off two-factor authentication after I’ve turned it on?

If you already use two-factor authentication, you can no longer turn it off. Certain features in the latest versions of iOS and macOS require this extra level of security, which is designed to protect your information. If you recently updated your account, you can unenroll within two weeks of enrollment. Just open your enrollment confirmation email and click the link to return to your previous security settings. Keep in mind, this makes your account less secure and means that you can't use features that require higher security.

Hello,

• If you already use two-factor authentication, you can no longer turn it off. Certain features in the latest versions of iOS and macOS require this extra level of security, which is designed to protect your information. If you recently updated your account, you can unenroll within two weeks of enrollment. Just open your enrollment confirmation email and click the link to return to your previous security settings. Keep in mind, this makes your account less secure and means that you can't use features that require higher security.

Drake

If necessary, contact Apple ID Support for assistance with the email.  See the Apple Support articles below for contact information.  

Apple ID - Official Apple Support.    

Contact Apple for help with Apple ID account security - Apple Support.   (Link doesn’t always load)  

Get Support          Work through the screens to get a chat option. You may have to pick a slightly different problem.

Apple Support schedule phone call

https://twitter.com/AppleSupport.          People have posted it may take an hour or more to get a response.

Perhaps if you explain what problems you're having with it, someone can help you learn to use it. Generally, you shouldn't have to interact with 2FA very often. As long as you have your trusted devices set up properly, it shouldn't be hard to use at all.

If it is within 2 weeks follow the instructions I gave you.

You should have revived an email when you enabled it.

In it there is a link you can press to unroll.

It should look something like this:

If you did not enable two-factor authentication and believe that an unauthorised person has access to your account, you can return to your previous security settings

The underlined section is the link you must press

Check if it might have come to another of the email addresses on your apple account:

About your Apple ID email addresses - Apple Support

And check your spam folders.

You are welcome.