The impact could have damaged several things that would prevent starting:
* Fuel system: A damaged fuel line, pump, or injector.
* Electrical system: A broken wire, damaged fuse, or problem with the ignition system. The impact may have knocked something loose or broken a connection.
* Engine components: Internal damage to the engine itself is a possibility.
You need to have the car inspected by a mechanic. Trying to diagnose and fix this yourself without experience is risky. A professional can properly assess the damage and determine the cause of the no-start condition.