-I do not think it will be helpful to file I-290B (only save some time but it is difficult to win)
如果我媽媽不回去,簽證過期後等我入籍再給她申請green card (我不工作,要我老公作擔保)會不會有問題?
-It should be fine as long as your family income can meet the requirement to sponsor your mother GC application.
多謝了!!!!!