8老师, I am about ready to file H-1B/H4 extension. After talking with USCIS custom service, I was totally confused on the address I should send to. Which one I should use?
USCIS, California Service Center, ATTN: H-1B Extension, PO Box 10129, Laguna Niguel, CA 92607-1040 or
USCIS, California Service Center, PO Box 10539, Laguna Niguel, CA 92607-1053?
I am very grateful for your help. Hopefully I won't need to bother you after this question on this case.