想用Fedex寄,移民局的网页上有两个地址,
For concurrent filing of Forms I-485 or to file Form I-140 alone:
USCIS
Texas Service Center
P.O. Box 852135
Mesquite, TX 75185
和Courier Address:
USCIS
Texas Service Center
4141 North St. Augustine Road
Dallas, TX 75227
该用哪一个呀?