To the rear. Not, as a lot of people think, "to the right." A TTR actually turns to the left- it's used to reverse direction. (Similar, but not identical to, an about face.) Step forward on 8 as if it were a regular marching step, then between counts 8 and 1 you pivot to face the direction you just came from, turning towards your left shoulder. Step down on 1 and continue to march as normal. All 8-to-5 rules apply. See also: SS Translator, about face.