When I turn my key off my car won't shut off

Hey there if your car won’t shut off the first thing you should do is pop the hood open and disconnect the battery to shut it off the second thing is that you probably need a new ignition or you have a wiring issue

I would look at your key to see how worn it is, this will give you a clue as what the condition of the ignition may be. Do you have another key to try?The previous answer form techno chicken is correct. The tumblers inside your ignition are worn causing the connections inside to not disengage. It's highly likely that your ignition needs replaced.