I am a immigrant, when both of my parents became naturalized citizens I was under the age of 18. Now I am looking to travel and will be needing a passport for this. Looking at the applying sections it says I need to show proof of citizenship would that mean for me to fill out the N-600 form? If this is the case how long do N-600 usually take to process? If this is not the case what will I need to send in to prove that I am a citizen? - Thank you.