Step 1: Jump as high as you can. As you jump, pull up on the handlebars to lift the scooter up with you.
Step 2:Kick the deck of the scooter behind you with your back foot. Once you reach the peak of your jump, flick the rear edge of the deck hard with your toes. It will begin to swing outward in a wide circle away from you. This is the “whip” part of the tailwhip.
Step 3: Use your arms to assist the spin during the whip. At the same moment that your feet leave the deck, tilt the handlebars slightly in the direction that it's moving and “pump” your arms up and down. Then, tilt the other way as it starts to swing back around. If you do this correctly, it will cause the deck to rotate faster.
Step 4: Catch the deck with your back foot to stop its rotation. Aim to stop the deck a moment before the wheels touch down. Both feet should return to where they were while you were setting up the trick, or somewhere close.
Step 5: Ride out smoothly and try it on other features.