Where Do You Send the N-400 Form?

The website for the United States Citizenship and Immigration Services contains a list instructing which of the addresses to use for each state. All persons associated with the military, and their relatives, must send their forms to Nebraska Service Center, P.O. Box 87426, Lincoln, NE 68501-7426. The USCIS website also gives addresses for applicants who want to submit their applications via courier or express mail services.