While the steps you take generally depend on the severity of damage, the most important thing you can do after an accident is try your best to stay calm. Panic can make a bad situation worse. If need be, take a few deep breaths before assessing the situation. If anyone is seriously hurt, call 911 immediately; this is one of those times when seconds can matter.
If a police officer is on the scene, he will write up an official accident report for you. If not, you’ll need to file an accident report on your own. If you’ve taken the pictures and grabbed all the information you can, this should be a straightforward process. Make sure that you file it within a few days since many states have limits as to how long you can wait before reporting an accident. You can find the form at the Department of Motor Vehicles’ website.