Find out if you're eligible 2. How do I apply for a new passport at The Smithtown Library?Passport applications will be taken from am to pm only. Groups of three (3) or more must schedule an appointment. How to complete your form: Enter the information on the online form and print. Most children must appear in person at a passport acceptance facility to apply for a passport. The cost will vary depending on the child's age. The town clerk's office, at 655 Main Street in Islip, accepts completed passport applications from Monday through Friday, a.m. Use our Form Filler to fill out your form and print it. For the best experience, use a desktop or laptop computer.