All Texas residents can apply for a name change under Texas Family Code Chapter 45. You will probably need a court order to change your name from the name currently on your birth certificate to the name you have always used.Change your own name as an adult. Go to your local DPS office to get a new driver's license reflecting your new name. Complete the adult name change petition. To file a petition for a name change, you must be at least 18 years of age. Once your account is set up and you are signed in, select 'Start a New Case' on the home screen. Click to view the Adult Name Change packet from TexasLawHelp. Once you've filled out the name change forms, DO NOT SIGN THEM. The Original Petition for Change of Name must be signed in front of a notary.