When you register for a new Facebook account you enter your profile details. How ever these profile details can later be changed by editing them. To do this go to your Facebook home page. Open the link that says view my profile which is located beside your picture. You can also click on your name or your picture. This takes up your profile page. At the top you can see boxes which are links to various pages like info, photos etc. Open the info box and there you can see your profile information. Now you can click on any of the info and edit them. This video shows how to edit Facebook profile.