turn Two-factor authentication off

If you enrolled less that 14 days ago, open your confirmation email and click the link in it to return to your previous security settings. Keep in mind that turning off two-factor authentication makes your account less secure and means you can’t use features that require a higher level of security.

If its been more than 14 days or this is an Apple ID of recent creation, it cannot be turned off.

With that said, it should be mostly transparent in every day use.

The only time you should see it, is when logging in to a new device for the first time, or logging in to an Apple secure website such as https://iCloud.com or https://appleid.apple.com from an untrusted browser.

More info by clicking here -> Manage two-factor authentication for your Apple ID from iPhone - Apple Support

Hello,

I see you want to disable two-factor authentication. For some background I suggest you read the document: "Two-factor authentication for Apple ID" - Two-factor authentication for Apple ID - Apple Support

Several years ago Apple transitioned to using two-factor authentication for additional account security. Accounts created since that time automatically use two-factor authentication and this cannot be disabled.

Some people have older accounts from before two-factor authentication was mandatory on new accounts. Apple encourages those users to transition to two-factor authentication when signing in on their accounts because without it "your account is less secure and you can't use features that require a higher level of security." Those owners of older accounts who just activated two-factor authentication have two weeks to change their minds and return to older security settings.

If you have an older account, recently activated two factor authentication, and you're within the two week period for turning it off again, you should check for an email from Apple for a way to do this. If you don't see one about this, look in your junk mail folder.