If the accident is a minor one (like a 'fender bender') you may only be guilty of a minor crime like failing to cooperate with an investigation. However, as the accident gets more serious, so do the consequences for leaving the scene.

If someone is killed in the accident, and you are the driver, you may be charged with felony hit and run or the felony of leaving the scene of a deadly accident. Felonies are the most serious crimes, which carry a punishment of more than a year in State prison.

The juvenile system uses slightly different terminology, which you can read about in some of the other questions on this site, but the bottom line is never leave the scene of a traffic accident until an investigating officer says that it is time to go.