Two points if it is touched by the Punt Team First. Punt Return may pick it up and return it. It is a free play for the return team. Meaning if the run it back 98 yards and fumble at the two, Return team would keep possession way back at the one. Return team gets the ball at "First Touch by the Punt Team or the result of the Return/Play"
Next, HS during punts it is the ball. As a member of the punt team I can run down , stand in the end zone, and keep the ball out with my hands as long as the ball does not break the plane of the goal line.
On kickoffs its the goal line, Returner steps on goal line, plays is dead touch back.