What is the N‑400 form?

The N‑400, Application for Naturalization, is the official USCIS form used by permanent residents to apply for U.S. citizenship.

Can I submit the N‑400 online?

Yes. After completing the fillable PDF, you can upload it through your USCIS online account. Alternatively, you may mail a printed copy.

How long does it take to fill out the form?

Most applicants complete the form in 30‑45 minutes when using a fillable PDF with guided help.

Do I need a digital signature?

USCIS requires a physical signature on the printed form. The PDF filler lets you add a typed signature for preview, but you must sign it by hand before mailing.

What supporting documents are required?

Typical documents include a copy of your green card, two passport‑style photos, tax returns, and proof of residence. The form’s instructions list all required items.

Is there a filing fee?

Yes. As of 2024, the fee is $725 (including the biometrics fee). Check the USCIS website for the latest amount.

Can I edit the form after I download it?

Once downloaded, the PDF becomes static. Save a copy before finalizing, or use the Formize filler to make changes before the final download.

What if I make a mistake on the form?

If you discover an error after submission, you can file Form N‑565 (Application for Replacement Naturalization/Citizenship Document) or submit a corrected N‑400 with a cover letter explaining the mistake.

Fillable N‑400 Application for U.S. Citizenship

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Fillable N‑400 Application for U.S. Citizenship

Applying for U.S. citizenship is a major milestone, and the first step is completing the USCIS N‑400 Application for Naturalization. Formize lets you fill out this official form directly in your browser—no download, no PDF editor, no hassle.

Why Use the Formize Fillable PDF?

Instant loading: Click the button and the Formize PDF Filler loads in seconds.
Auto‑save: Your progress is saved automatically, so you never lose data.
Secure & private: All data stays encrypted in your browser; we never store personal information.
Guided help: Inline tooltips explain each field, reducing errors.

Step‑by‑Step Guide to Complete the N‑400

Follow these simple steps to submit a flawless citizenship application:

Click "Fill out this form" on this page.
Wait for the Formize PDF Filler app to load (usually under 5 seconds).
Enter your personal information exactly as it appears on your documents.
Answer the eligibility questions truthfully.
Upload supporting documents where required.
Review the summary screen for any missed fields.
Download the completed PDF or print it for mailing to USCIS.

Common Mistakes to Avoid

Leaving any required field blank – the filler will highlight omissions.
Using nicknames or abbreviations that don’t match legal documents.
Submitting an outdated photograph (must be taken within 30 days).
Failing to sign the form electronically before downloading.

Where to Submit Your Application

After completing the N‑400, you have two options:

Online filing: Upload the PDF through your USCIS online account.
Mail filing: Send the printed, signed form to the USCIS lockbox address listed in the Instructions for N‑400 (PDF linked below).

Make sure to include the filing fee and any required supporting documents to avoid processing delays.

Frequently Asked Questions

Below are quick answers to the most common questions about the N‑400 form.

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FAQ

What is the N‑400 form?
The N‑400, Application for Naturalization, is the official USCIS form used by permanent residents to apply for U.S. citizenship.
Can I submit the N‑400 online?
Yes. After completing the fillable PDF, you can upload it through your USCIS online account. Alternatively, you may mail a printed copy.
How long does it take to fill out the form?
Most applicants complete the form in 30‑45 minutes when using a fillable PDF with guided help.
Do I need a digital signature?
USCIS requires a physical signature on the printed form. The PDF filler lets you add a typed signature for preview, but you must sign it by hand before mailing.
What supporting documents are required?
Typical documents include a copy of your green card, two passport‑style photos, tax returns, and proof of residence. The form’s instructions list all required items.
Is there a filing fee?
Yes. As of 2024, the fee is $725 (including the biometrics fee). Check the USCIS website for the latest amount.
Can I edit the form after I download it?
Once downloaded, the PDF becomes static. Save a copy before finalizing, or use the Formize filler to make changes before the final download.
What if I make a mistake on the form?
If you discover an error after submission, you can file Form N‑565 (Application for Replacement Naturalization/Citizenship Document) or submit a corrected N‑400 with a cover letter explaining the mistake.

MITEN

Kuinka täyttää N-400 ilmaiseksi verkossa 5 helpon vaiheen avulla:

1
Open the Fillable Form
Click the "Fill out this form" button on this page. The Formize PDF Filler app will open in a new window.
2
Load the N‑400 Form
The app automatically loads the USCIS N‑400 PDF. Wait a few seconds for all fields to become interactive.
3
Enter Your Information
Type directly into each field. Use the tooltip icons for guidance on required formats and supporting documents.
4
Review & Save
Click the "Review" button to see a summary of any missing or incorrectly filled fields. Save your progress at any time.
5
Download or Print
When you’re satisfied, click "Download PDF" to save a copy or "Print" to prepare a hard‑copy submission for USCIS.

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