U.S. Citizenship and Immigration Services (USCIS) announced effective immediately, naturalization applicants must file Form N-400 Naturalization Applications at the USCIS Lockbox in either Phoenix or Dallas. The filing location depends on where the applicants resides.     Naturalization applicants who live in Alaska, Arizona, California, Colorado, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oregon, South Dakota, Utah, Washington, Wisconsin, Wyoming, Territory of Guam, or the Commonwealth of Northern Mariana Islands must file Form N-400 application to the USCIS Phoenix Lockbox.   USCIS Phoenix Lockbox: P.O. Box 21251 Phoenix, Arizona, 85036   Naturalization applications who reside in Alabama, Arkansas, Connecticut, Delaware, District of Columbia, Florida, Georgia, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mississippi, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Puerto Rico, or the U.S. Virgin Islands must file Form N-400 application to the USCIS Dallas Lockbox.   USCIS Dallas Lockbox P.O. Box 660060 Dallas, Texas 75266  

For more information, please visit the USCIS Web site.