“Accidents happen. It’s easy to unintentionally scratch or damage your car door if you aren’t paying attention.
If you don’t care about the door looking perfect, you may be able to bend the piece of metal back out on your own. Try opening the door, putting a piece of wood between the door and door frame, and gently closing the door on the wood to bend the bottom edge back out.
If this doesn’t work, you can visit a repair shop. The cost will vary depending on the provider and location. That said, repairing a small dent should cost around $150.