Is lying obligatory if a car accident is not reported at the moment it occurs, and some people asked me to park the car and call the police, reporting that the car was hit by something while it was parked, so that the insurance company would approve the repair, and to avoid paying for the repair from my salary?

Lying is forbidden unless it becomes a means to save a life or property. Therefore, there is no harm in the aforementioned stratagem to repair the car if no other means are available, because leaving it damaged contributes to the spoilage of property and exposes its owner to punishment. It must be noted that it is not permissible to take from commercial insurance companies more than the amount paid, to avoid consuming people's wealth unlawfully. As for cooperative insurance, it is permissible.