Form N-400
Form guide
Form N-400 is the application for naturalization — the form that takes a green card holder to citizenship. It reviews your years as a resident: your time, your travel, your taxes, and your character, and it ends with the English and civics tests at the interview.
Part by part
The five-year path, or the three-year path for spouses of U.S. citizens.
Where you have lived and every trip outside the U.S. — long trips raise continuous-residence questions.
Taxes, arrests, and the yes/no history section. Truthful answers with explanations beat silence.
English reading, writing, and speaking, plus the civics test — practiced ahead with the free tool.
Watch for
An incomplete travel list — USCIS has entry records and compares
Unaddressed tax issues instead of documented payment plans
For men who lived in the U.S. between 18 and 26: the Selective Service question left unexplained
Filing earlier than the 90-day early window allows
Every one of these is a completeness problem — the kind the software checks for before your packet is marked ready.
Where it appears
Form N-400
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