8 老师，请教一下：我父母的的B-2签证明年1月底到期。想给他们班延期。有几个问题请教一下：
1，什么时候递申请合适，现在还有快两个月，太早吗？
-Fine to do it now.
2，延期程序是什么？填什么表？
-Just file I-539 following the I-539 instructions. See:
http://www.uscis.gov/i-539
可以网上申请吗？
-Yes. See:
http://www.uscis.gov/uscis-elis/e-filing-using-uscis-elis/e-filing-form-i-539-using-uscis-elis
3，如果要寄材料的话，两个人的材料放一个信封吗？支票写一张还是分开写？
-If your parents have their marriage certificate in hand, they only need to file one I-539 for both of them, and only need to pay one I-539 filing fee. Otherwise, need to file two I-539 and issue two checks if they don't have their marriage certificate to prove their relationship.
1，什么时候递申请合适，现在还有快两个月，太早吗？
-Fine to do it now.
2，延期程序是什么？填什么表？
-Just file I-539 following the I-539 instructions. See:
http://www.uscis.gov/i-539
可以网上申请吗？
-Yes. See:
http://www.uscis.gov/uscis-elis/e-filing-using-uscis-elis/e-filing-form-i-539-using-uscis-elis
3，如果要寄材料的话，两个人的材料放一个信封吗？支票写一张还是分开写？
-If your parents have their marriage certificate in hand, they only need to file one I-539 for both of them, and only need to pay one I-539 filing fee. Otherwise, need to file two I-539 and issue two checks if they don't have their marriage certificate to prove their relationship.
