To hit the point home, BONEZ is 100% correct.
While I'm sure your trainer is very experienced in some aspects, but all AAS WILL cause shutdown of the HPTA to some extent, and PCT is important (not just for recovery of the HPTA).
Reading thoroughly on SERMS will elucidate these points, and will allow you to be almost certainly more educated on the subject than your trainer.
Also, if entering an untested show, why only 40 mg of Anavar, and only Anavar itself?
Whatever your tactic, good luck in the show.