I just buy a new Iphone 12 pro max I qualify for free apple tv for 1 year?

If your account is for a country where Apple TV+ is available, and if you meet the other conditions, then you should qualify for the offer. The year offer ended per July 1st. The new duration is 3 months now.

Read here how to redeem: Apple TV+ offer - Apple

Read here about the conditions: Apple TV+ offer - Terms and conditions - Apple

Read here if you have trouble redeeming: If you can't redeem your promotional trial of Apple TV+ - Apple Support