Many new immigration forms MUST be used starting February 21, 2017, according to US Citizenship and Immigration Services (USCIS). New fees must be paid now, and the new N-400 Naturalization form must also be used immediately. The government will reject filings if old forms or fees are incorrectly submitted. USCIS introduced the new forms on their website with no advance notice, except for the N-400. After strenuous objections, they have now decided to accept previous forms until February 21. You can find the date of the form in small print at the left side of the very bottom of the page.
Their announcement states:
“When new fees for most of our forms went into effect on December 23, 2016, we published updated versions of the forms at uscis.gov/forms. We strongly encourage customers to submit these new versions, which are updated with the new fees and have an edition date of 12/23/16. We will accept prior versions of forms, with the exception of Form N-400, until February 21, 2017. However, all filings postmarked 12/23/16 or later must include the new fees or we will reject them. We will accept only the 12/23/16 edition of Form N-400, Application for Naturalization. The updated forms are currently available only at uscis.gov/forms, where all of our forms can be downloaded for free.”