Read your owners manual. My Jeep Liberty 2006 manual says the transfer case is in neutral and the transmission lever is in park. Key is in the off position so that the steering wheel lock is not active.
I first put my auto transmission in neutral with the engine running, then transfer case in neutral, turn off the engine. Since the auto transmission is not yet in park, the key will stop in the off position and you don't have to worry about turning it too far. Then shift the auto transmission to park. Try it on a sloped surface and you will see that the car free wheels when you set it up this way.
Pete - Full Timing
2000 Country Coach Magna 40', CAT C10, #5892
2006 Jeep Liberty