Visit the United States Citizenship and Immigration Services Forms website, and select N-400 Application for Naturalization to access a PDF version of the form. This form can be completed in a Web browser, but the USCIS website recommends that applicants download the form to their local computers before completing.
The N-400 form is an Application for Naturalization, and careful attention must be given to the detailed application instructions. The N-400 Application refers to information contained in A Guide to Naturalization, which is also available in PDF form on the USCIS website. This guide should be consulted when completing the N-400 Application.
As explained on the USCIS website, the naturalization process involves special instructions that vary based on physical location and military status. In addition, the N-400 form must be filed with additional documentation and required fees, all of which are listed on the USCIS website. Applicants may choose to complete the application process on their own, or they may choose to hire legal counsel to assist them with the process. If legal counsel is obtained, the USCIS website states that a Form G-28, Notice of Entry or Appearance as Attorney or Representative, must be filed with the N-400 or at the time of the applicant's interview.