Fill Out Form N-400 with AI

Form N-400 at a glance

Counted on Oct 6, 2026 from the official PDF, with the same engine FillWise fills it with.

What is in Form N-400

What to have ready for Form N-400

These are the facts FillWise's map of this form looks for in your notes, grouped by the person they belong to.

• The applicant: A-Number (green card USCIS#), current legal name: last name, current legal name: first name, current legal name: middle name, other name used since birth 1 (maiden, alias): last name, other name used since birth 1 (maiden, alias): first name, other name used since birth 1 (maiden, alias): middle name, other name used 2: last name, and 73 more.
• Eligibility: general (5 yrs LPR), spouse of US citizen (3 yrs), VAWA, military, other, USCIS field office for interview, exact option, reason for filing.
• The spouse: current spouse is a current member of US armed forces, current spouse: last name, current spouse: first name, current spouse: middle name, current spouse date of birth, date applicant married current spouse, current spouse lives at applicant physical address, US citizen spouse became citizen: by birth in US, or other (naturalization), and 4 more.
• Child1: child 1 (under 18): first and last name, child 1: date of birth, child 1: resides with me / does not reside with me / unknown/missing, child 1: biological son or daughter / stepchild / legally adopted, provides financial support for child 1.
• Child2: child 2 (under 18): first and last name, child 2: date of birth, child 2: resides with me / does not reside with me / unknown/missing, child 2: biological son or daughter / stepchild / legally adopted, provides financial support for child 2.
• Child3: child 3 (under 18): first and last name, child 3: date of birth, child 3: resides with me / does not reside with me / unknown/missing, child 3: biological son or daughter / stepchild / legally adopted, provides financial support for child 3.
• Employer1: current employer or school (or self-employed/unemployed): name, employer/school 1: city or town, employer/school 1: US state 2-letter code or province, employer/school 1: ZIP or postal code, employer/school 1: country, employer/school 1: start date, employer/school 1: occupation or field of study.
• Employer2: previous employer/school 1 (last 5 years): name, employer/school 2: city or town, employer/school 2: US state 2-letter code or province, employer/school 2: ZIP or postal code, employer/school 2: country, employer/school 2: start date, employer/school 2: end date, employer/school 2: occupation or field of study.
• Employer3: previous employer/school 2 (last 5 years): name, employer/school 3: city or town, employer/school 3: US state 2-letter code or province, employer/school 3: ZIP or postal code, employer/school 3: country, employer/school 3: start date, employer/school 3: end date, employer/school 3: occupation or field of study.
• Trip1: trip 1 outside US (last 5 years, most recent first, >24h): date left US, trip 1: date returned to US, trip 1: countries visited.
• Trip2: trip 2 outside US: date left US, trip 2: date returned to US, trip 2: countries visited.
• Trip3: trip 3 outside US: date left US, trip 3: date returned to US, trip 3: countries visited.
• Trip4: trip 4 outside US: date left US, trip 4: date returned to US, trip 4: countries visited.
• Trip5: trip 5 outside US: date left US, trip 5: date returned to US, trip 5: countries visited.
• Trip6: trip 6 outside US: date left US, trip 6: date returned to US, trip 6: countries visited.
• Background: ever claimed to be a US citizen, ever registered to vote or voted in a US election, currently owes overdue federal/state/local taxes, since LPR, called self nonresident on a tax return or skipped filing, ever member of a Communist or totalitarian party, ever advocated overthrow of government, world communism, sabotage, ever associated with a group that used weapons/explosives to harm, ever associated with group in kidnapping, assassination, hijacking, and 57 more.
• Offense1: crime/offense/arrest 1: what it was, offense 1: date of crime or offense, offense 1: date of conviction or guilty plea, if any, offense 1: place (city, state, country), offense 1: result, offense 1: sentence.
• Offense2: crime/offense/arrest 2: what it was, offense 2: date of crime or offense, offense 2: date of conviction or guilty plea, if any, offense 2: place (city, state, country), offense 2: result, offense 2: sentence.
• Offense3: crime/offense/arrest 3: what it was, offense 3: date of crime or offense, offense 3: date of conviction or guilty plea, if any, offense 3: place (city, state, country), offense 3: result, offense 3: sentence.
• Offense4: crime/offense/arrest 4: what it was, offense 4: date of crime or offense, offense 4: date of conviction or guilty plea, if any, offense 4: place (city, state, country), offense 4: result, offense 4: sentence.
• Offense5: crime/offense/arrest 5: what it was, offense 5: date of crime or offense, offense 5: date of conviction or guilty plea, if any, offense 5: place (city, state, country), offense 5: result, offense 5: sentence.
• Fee reduction: household income at/below 400% poverty guidelines, total household income, dollars digits, household size, digits, household members earning income incl. applicant, is head of household, name of head of household if not applicant.

Fields to watch on Form N-400

• 77 questions answered with a Yes box. FillWise ticks one only when your notes answer it; the rest stay empty for you.
• 49 boxes with a fixed number of characters, such as USCIS Online Account Number (if any) (12), Provide your Social Security number (SSN) (if any). ► (9), ZIP Code (5), Postal Code (9). Long numbers are split across them, so check the digits.
• 5 dropdowns, such as Feet (8 options: 2, 3, 4...), Inches (13 options: 0, 1, 2...), State (63 options: AA, AE, AK...). Only one of the listed values can go in.

How to fill Form N-400 with FillWise

1. Open the official PDF from uscis.gov in Chrome.
2. In the FillWise side panel, paste your notes (for Form N-400: information about your eligibility, information about you, information about your residence) or attach a photo of a document, and press Fill form.
3. Check all 14 pages of the downloaded PDF before anyone signs.

Without the extension: Fill a PDF in your account.

How FillWise handles Form N-400

FillWise has a ready map of this form's fields. It recognizes the PDF by its field names and stops treating it as 440 separate boxes: the AI only pulls the facts out of your notes, each tied to a person on the form, and the map places them:

• dates in the form's own format;
• Yes/No pairs and other checkbox groups, ticked from the answer in your notes rather than box by box;
• numbers split one digit per box where the form asks for that;
• the daytime phone taken from the mobile number when that is the only phone.

The PDF is encrypted with an empty password; FillWise opens it like any other.

It also carries Adobe XFA data; FillWise fills the regular fields and drops the XFA part, so the result opens in any reader.

What to check before you file

• The edition. Agencies replace their forms with new editions. This page describes the 01/20/25 edition; check that your copy is still the current one on uscis.gov/n-400.
• The questions about trips abroad, past addresses and good moral character are answered under penalty of perjury: read each one yourself.
• Names and numbers character by character; signatures, fees and supporting documents stay with you.

Filling Form N-400 for many clients

Bulk fill in your FillWise account takes Form N-400 and a CSV or Excel sheet with one client per row. It fills the first one and stops so you can check the result, then fills the rest and hands back one zip. Each copy costs 3 fills, the same as filling it on its own. For one client's whole case, add Form N-400 with Form G-28 and Form I-751 and paste the client's notes once: every form is filled from them. How it works step by step: bulk PDF form filling guide. More on immigration packets in the USCIS forms guide and on FillWise for legal teams.

Cost

Form N-400 has 14 pages, so filling it costs 3 fills: FillWise charges a PDF fill by the pages it fills, one fill per started 5 pages. The free plan starts with 20 fills and then tops back up to 5 fills a week, no card required. Paid plans are on the pricing page.

Privacy

The PDF is filled in your browser; only its field list and your data go to our server for the AI, and nothing is stored. Details: privacy and security.