이민서류종류1 Explanation of USCIS Application Forms (이민국 서류 개관) I-539 If you are an F Visa or M Visa student and you need to extend your stay in the United States or change your nonimmigrant status, you need to file a Form I-539, “Application to Extend/Change Nonimmigrant Status,” with U.S. Citizenship and Immigration Services (USCIS). 2018. 1. 26. 이전 1 다음