Go to any post office; they should have the form you'll need to fill out. It is recommended (in the USA) that all males who have reached the age of 18 register for selective service. In the event of a draft, those who have registered are able to choose their assignment (For example, a conscientious objector could request a posting at a medical facility or office). Those who have NOT registered, however, generally get sent to the battlefront if their number is called. Registering does not guarantee military service; nor does not registering guarantee exemption. Rather, registering gives one the privilege of choosing one's assignment. I just remembered something I've noticed among my high-school students: some don't know that there's a difference between selective service and enlisting. If you're actually just looking to enlist in the armed forces, go to the nearest recruitment center to get started. (But please register for selective service FIRST! You don't want to get stuck in an assignment you d