Open the door. Look at the kick panel and try to determine if the panel goes underneath the rocker plate that runs on the inside door jam of the car. If it does, remove the rocker plate by removing the screws that hold it in place or by lifting it up to release the clips.
Look for a screw holding the kick panel in place, or possibly a plastic nut. Remove the screw with a flathead screwdriver or the nut by hand.
Pull on the kick panel to release any clips holding it in place. Then pull the kick panel out of the car.