How do you get perfect flip on a kickflip?

i know your problem, i had the same one when i first started skating. first of all, flick your foot at the bottom of the nose, near the edge of the concave, for a good flip. if anything you WANT to overflip it and when you see the griptape come around, lightly stomp your foot and continue riding. kickflips are very hard to master. i learned heelflips before them, which are easier to most people. try a heelflip and see if that will help you under stand the concept of it. also practice makes perfect, skateboarding is not a sport where you can skip something if you cant do it after 10 tries, keep perseveering and practice. i wish you good luck, now go skate!