....我太太和孩子2006 年1月来美. 应该不能报税. 但可以今年申请税号吗?....
What 税号? They already have SSNs, don't they?
If they do, it's ILLEGAL...hehe...unecessary, to get 税号 (ITIN). Read this thing:
http://www.irs.gov/businesses/small/international/article/0,,id=96696,00.html#itin