If you car got involved in accident , the first thing to do is to call the insurance company for towing arrangement. This is very important because towing service arranged by insurance company will definitely send you car to the panel workshop.
Panel workshop will arrange everything through claim system from a-z. You dont have to anything just wait for notification from insurance company. Usually the will send notification via SMS for every step involved in claim process.
Sending your vehicle to non panel workshop will resulted in delay in claim process because they workshop does not link with the insurance company.