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On February 4, 2014, USCIS published a revised Form N-400 (Rev. 9/13/13), Application for Naturalization. When you fill out your Form N-400, you must complete every section and answer every question as completely as you can. Also, please note that, as of May 5, 2014, USCIS will only accept the Form N-400 that has a revision date of 9/13/13.  The revision date is printed on the lower left corner of the form.