Form N-400, Application for Naturalization

What is Form N-400?

Form N-400 is an application for U.S. citizenship (naturalization). The Form N-400 is used by Lawful Permanent Residents over the age of 18 who meet the eligibility requirements to apply for U.S. citizenship.

Take the eligibility questionnaire at the link given below to see if you qualify for naturalization:
https://www.uscitizenship.info/qualify.htm

http://kb.immigrationdirect.com/Knowledgebase/Form-N400-Application-for-Naturalization