I cannot get my tv to accept my apple password...what do I do?

Do you use this account on other devices as well (e.g. iPhone),

or is this a new account?

What is the exact error message that you get, if any?

An Apple ID account should have full user details, a verified email address (respond to test message), and a valid payment method.

How to create a new Apple ID - Apple Support

Manage your Apple ID - Apple

Apple ID support - Official Apple Support

If you forgot your Apple ID password - Apple Support

Change, add, or remove Apple ID payment methods (on Apple devices) - Apple Support

Change your Apple ID payment method if you don't have an Apple device - Apple Support