Go to a passport acceptance facility or retail photo shop to have your passport picture taken. Passport acceptance facility photos are taken precisely to U.S. Department of State specifications. If you take your own passport photo, you must ensure you meet each requirement.
Locate the photo square on the front page of your passport application. Line up one of your passport photos evenly with the photo square. Staple each of the four corners of your passport photo to your application. Do not tape your photo, and do not use less than four staples in the designated spaces.
Insert your second photo into the envelope with your passport application, and mail it to the U.S. Department of State.