The tee box you play off is determined by the tier you are on..
Hacks | Amateurs >>> Teebox 1 red (shortest)
Pros | Tour Pros >>> Teebox 2 white
Masters | Tour Masters >>> Teebox 3 blue
Legends | Tour Legends | Champions >>> Teebox 4 black (longest)
You can change your tee box by playing practise games, but none of your stats will be recorded.