I am about to send off my N400 application on Friday but I am a litte confuse as what to send in with my application. What do I need to send in with my application? I called the National customer Service Number and I was told that I need to send Marriage certificate, copy of greencard, photos and filing fees. Is this correct? On the INs website they are asking for completely different documents such tax transcripts and so on. Which one is correct? What is the Time line for NSC with N400? Please email me your responses at Aleciajohnson76@yahoo.com