U.S. Citizenship and Immigration Services (USCIS) announced that the transition date for the revised N-400 form has been revised. Form N-400 is the Application for Naturalization. The transition date has been extended to correspond with the date for USCIS's new fees.
Currently, applicants may file either the older edition (9/13/13) or newer editions (3/26/16) (9/29/16) of the form until 12/22/16. After 12/22/16, applicants should file the new form.