Hi, I have a TASCO TITAN, 3-9x42, How do I re'paralax it to 35yds

I don't know if your parallax is adj, usually something that comes with the scope, set for around 100 yards. Set up your rifle in sand bags, look at a target at 100 yards, without moving the rifle, move you head left and right , up and down, and see if the cross hairs move off target, No? good, now try it again at 25, 50, 75, etc, where ever it is the least movement is your most accurate range. Some scopes will move 4 to 5 inches off. Not good.