Of course he's NOT going to release his tax returns .... by not releasing them, he has made the left focus on that (it's called pap for the masses).
That way, they won't bother to investigate him further, and find out about his secret deal with the devil trade his soul for Hillary getting sick, his agreement to provide Ms America contestants to Jimmy Hoffa at his exclusive condo in Trump Towers in return for a secret cabal with the United Auto Workers to force Ford to leave the country just in time for the election, his payoffs to Australian football players to stay home and not take jobs from college players who can't read or write, or worst of all --- OMG! --- paying players to boycott the Ft Lauderdale Semi-County Jai Alai tournament as a protest against Black Lives Matter.