how do i turn off two factor authentification

It is not possible.

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.

My Apple TV doesn’t pop a field to enter the authentication code. It just keeps saying the password is wrong, while my phone asks if I want to allow access then provides the code. How can I get logged into my apple account if it won’t let me key in the authentication code?

See -> Get a verification code and sign in with two-factor authentication

Get a verification code and sign in with two-factor authentication - Apple Support