Legal Advice on Citizenship The naturalization process turns a lawful permanent resident into a U.S. citizen. An experienced legal team can help facilitate the entire process. Main Requirements: Be at least 18 years old.To know how to read, write, and speak English (with exceptions)To pass a history and civics exam (with exceptions)To demonstrate good moral conductTo have resided in the U.S. for the required time (3–5 years)To reside in the state for at least 3 months before applyingTo support the U.S. Constitution and government