Keep several copies of all forms you send to USCIS and other government offices. Send copies, not originals. Sometimes forms get lost, so keeping copies can help avoid problems.
Call Customer Service at 1-800-375-5283 or 1-800-767-1833 (for hearing impaired).
To get forms, visit the USCIS website or call the USCIS Forms Line at 1-800-870-3676.