Drape your baby's car seat with the white blanket or cloth so that it creates the necessary white background for the passport photo.
Place your baby in the car seat. Make sure your baby is awake; passport photos require the eyes to be open.
Check that the lighting is good in the room and does not cast shadows over your baby's face. Position the camera so the image is close up and the majority of the picture is the head. Or use the zoom lens.
Upload your pictures to your computer; follow your camera's instructions. Open the images in a software editing program and adjust the images to print at 2 inches by 2 inches. Print the images using color ink and photo paper.