These are some of the documents needed to make an accident insurance claim:
Duly filled insurance claim form
FIR of the accident
Your insurance policy papers
Bills and receipts of the repairs
Yes, you can claim insurance for dents. However, it is advisable to get small damages like dents and scratches repaired on your own and make claims for only heavy damages to your car.
If the extent of damage is minimal, you can pay for the damages on your own. If the damage is significant, you should make an insurance claim.