Green cards and citizenship
Review eligibility before applying
Naturalization requires eligibility, residence and travel history, good moral character, and English and civics requirements.
Resolve issues early
Long absences, criminal history, tax and child-support issues can affect a case.
Possible existing citizenship
You may need a Certificate of Citizenship or passport, not an N-400.
Accommodations
Disability exceptions need proper procedure and support; none is guaranteed.
What to bring
Complete information, including issues you think are old or resolved.
Proposed legal fee
N-400 $2,000–$3,500; complex N-400 $4,000–$7,000; N-600 $3,000–$5,000. Government charges and screening are separate.
My passport expired. Should I file an N-400?
Not merely for that reason. We first assess whether you may already be a citizen.
Reference: USCIS citizenship