To register, you simply go to any post office and fill out a Selective Service registration form. You also can register online. After your registration is processed, a Selective Service registration card will be mailed to you.
The Selective Service System gets addresses of men with driver’s licenses from the Department of Motor Vehicles (DMV), so you may be automatically registered when you turn 18. You should receive a letter from the Selective Service System within thirty days of your eighteenth birthday. It is your responsibility to make sure you are registered.