USCIS forms are filled as standard PDFs, so the data barcode Adobe Acrobat adds to some of them is not generated. USCIS processes forms with or without it. Print, sign in ink, and check the edition date before you file.
N-400
Application for Naturalization
440 fields, 14 pages
N-600
Application for Certificate of Citizenship
449 fields, 16 pages
N-300
Application to File Declaration of Intention
152 fields, 8 pages
N-426
Request for Certification of Military or Naval Service
31 fields, 2 pages
N-470
Application to Preserve Residence for Naturalization Purposes
184 fields, 7 pages
N-565
Application for Replacement Naturalization/Citizenship Document
139 fields, 7 pages
N-600K
Application for Citizenship and Issuance of Certificate Under Section 322
275 fields, 10 pages
N-644
Application for Posthumous Citizenship
143 fields, 4 pages
What is in Citizenship?
Citizenship holds 8 USCIS forms. Open any one and it loads in the editor, where you can fill it in your browser for free.
Search within the topic to narrow the list as you type, or go back to the forms library to see every topic. Check the edition date before you file.

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Citizenship FAQs
What forms are in this topic?
It holds 8 USCIS forms, such as N-400, N-600, and N-300.
Are these forms free to fill?
Yes. Open any form and fill it in your browser for free. Sign in when you want to download or print the filled copy.
How do I find one form in this topic?
Type a form number or a word in the search box above the list. The list narrows as you type.
Should I check the edition date?
Yes. Agencies retire old editions, so check the edition date on the form before you file it.
Where are the other forms?
The forms library lists every form topic. Open it to browse the topics this page does not cover.