When do you turn your wheels sharply left before backing slowly in a parallel parking maneuver?

You should turn your wheels sharply left before backing slowly in a parallel parking maneuver when your vehicle's rear is about to align with the rear bumper of the parked car in front of your intended parking space. This action helps angle your vehicle into the space while allowing enough room to clear the vehicle in front. Make sure to check your surroundings for pedestrians and other vehicles as you execute this maneuver.