After you log in, open your profile in the Members Only section. Select the Surnames tab in the lower box on your profile page. To add a surname, click on the piece of paper with the plus sign and fill in as much of the information as you have available. Note that alternate spellings can be included. To edit a surname entry, click on the pencil icon next to it and make your changes. To delete a surname, click on the trash can icon. Be sure to save your changes when you are done.