How to complete an N400 (Step by Step)

To complete a N-400, you will need to provide the following information:

• Eligibility Information
  • 9 Digit A-Number
  • Indication that you are at least 18 years of age and a lawful permanent resident for at least 5 years, a lawful resident for 3 years and married to a U.S. citizen for the last 3 years, a lawful permanent resident with a U.S. citizen spouse that is regularly engaged in INA section 319(b) employment abroad, applying on the basis of qualifying military service, or another reason. 
• Personal Information
  • Legal name
  • Name as it appears on permanent resident card
  • Other names used since birth
  • Whether you would like to legally change your name
  • U.S. social security number
  • USCIS online account number
  • Gender
  • Date of birth
  • Whether you have any disability or impairment that prevents your from demonstrating your knowledge of English and/or civics
  • Whether you meet an exemption from the English language test
• Accommodations for Individuals with Disabilities or Impairments
  • Whether you are requesting accommodation because of your disabilities or impairments
• Contact Information
  • Best daytime, evening, work, and mobile phone numbers
  • Email address
• Residence Information
  • Current physical and mailing addresses
  • Dates of residence
• Parents’ Information
  • Whether your U.S. citizen parents were married before your 18th birthday
  • Name of U.S. citizen mother, country of birth, date of birth, date became citizen, A-number
  • Name of U.S. citizen father, country of birth, date of birth, date became citizen, A-number
• Biographic Information
  • Ethnicity
  • Race
  • Height
  • Weight
  • Eye color
  • Hair color
• Employment and School History
  • Employer or school name
  • Address
  • Dates of attendance
  • Occupation 
• Time Outside the United States
  • Total days spent outside the United States during the last 5 years
  • Number of trips of 24 hours or longer outside the U.S. in the past 5 years
  • List of all trips of 24 hours or longer taken outside the United States in the past 5 years
• Marital History
  • Marital status
  • Whether your spouse is a member of the U.S. armed forces
  • Number of time you have been married
  • Current spouse’s name, prior legal names, date of birth, date of marriage, address, employer, citizenship status, immigration status, marriage history
  • Prior spouse’s name, immigration status, date of birth, country of birth, citizenship, date of marriage, date of termination of marriage, type of termination of marriage
• Children’s History
  • Total number of children
  • Names, A-Numbers, dates of birth, country of birth, addresses, relationship to you
• Additional Information
  • Whether you have ever claimed to be a U.S. citizen, registered to vote, voted, have a hereditary title in a foreign country, been declared legally  incompetent, owe any taxes, ever not filed taxes, called yourself a non-U.S. resident, been a member of any group, been a member of the Communist Party/any totalitarian party/a terrorist organization, advocated the overthrow of any government by force or violence, persecuted any person because of race/religion/national origin/membership in a social group/political opinion, associate with the Nazis, been involved in genocide/torture/killing/badly hurting someone on purpose/forcing sexual contact/not letting someone practice his or her religion, been a member of any military unit/paramilitary unit/police unit/self-defense unit/vigilante unit/rebel group/guerrilla group/militia/insurgent organization, been a worker or served in a prison/jail/prison camp/detention facility/labor camp/place where people were forced to stay, sold or given weapons to any person, received military/paramilitary/weapons training, recruited someone under 15 to serve in an armed force, use any person under 15 to do anything that helped people in combat, committed or attempted a crime you were not arrested for,  been arrested, been charged, been convicted, been placed in alternative sentencing or rehabilitative program, received suspended sentence and parole, been in jail or prison, been a drunkard, been a prostitute, been a smuggler of controlled substances,been married to more than one person at the same time, married someone for immigration benefits, helped someone enter the U.S. illegally, gambled illegally, failed to support your dependents or pay alimony, made any misrepresentation to obtain public benefit, given information or documentation to a U.S. government official that was false or misleading, lied to a U.S. official to gain admission or immigration benefits, whether you have been removed or deported, you have been ordered removed or deported, you have been placed in removal or deportation proceedings, you have any removal or deportation proceedings pending against you, served in the U.S. armed forces, currently in the U.S. armed forces, ever been court-martialed or administratively separated or  disciplined, ever left the U.S. to avoid the draft, ever applied for military exemption, ever deserted, registered for the Selective Service
  • Whether you support the Constitution and Government of the United States
  • Whether you understand the Oath of Allegiance to the United States and are willing to take it
  • Whether you are willing to bear arms on behalf of the U.S., perform noncombatant services in the U.S. armed forces, and perform work of national importance under civilian direction
• Statement, Certification, and Signature
  • Certification that the applicant can read and understand English or used an interpreter 
  • Signature
  • Date
• Interpreter’s Contact Information, Certification, Signature
  • Interpreter’s name
  • Business name
  • Mailing address
  • Contact information
  • Certification that interpreter is fluent in English and applicant’s language
  • Signature 
  • Date 
• Preparer’s Information
  • Name
  • Business name
  • Mailing address
  • Certification of attorney or accredited representative status
  • Signature
  • Date 
• Signature at Interview
  • USCIS Officer’s name or stamp
  • Date
  • Applicant’s signature
  • USCIS Officer’s signature
• Renunciation of Foreign Titles
  • List of titles
  • List of order of nobility
  • Applicant’s printed name
  • Applicant’s signature
  • USCIS Officer’s signature
  • Date
• Oath of Allegiance to the United States
  • Name
  • Signature
  • Date