Additionally, if the car is at a dealership for repairs or storage, it's important to notify the insurance company about the change in location. Some insurance policies may have restrictions or exclusions for vehicles that are not parked at the owner's primary residence.
The best course of action is to contact the insurance company directly and inquire about their specific policy for cancelling insurance on an inoperable car. They will be able to provide you with information on the requirements and process for cancelling your policy, as well as answer any questions you may have.