F1的5000刀treaty，如果我没有记错，只有头5年有的。你可以去查一下有关中美treaty的文件，确认一下。

另外，你2000年来美国，按理说，你06年就已经是resident 的，你07和08报前一年的税的时候应该都是resident的吧？

这个超过5年还能不能用treaty免5千是有争议的，有人很久以前给大使馆写信，回信那个人说可以，所以有些人就以此为证据，但是IRS从来没有发过memo澄清，所以这个没有定论，风险自负吧

I found the info for resident alien claming treaty

http://www.irs.gov/businesses/small/international/article/0,,id=106254,00.html

Example: Article 20 of the U.S.-China income tax treaty allows an exemption from tax for scholarship income received by a Chinese student temporarily present in the United States. Under the Internal Revenue Code, a student may become a resident alien for tax purposes if his or her stay in the United States exceeds 5 calendar years. However, the treaty allows the provisions of Article 20 to continue to apply even after the Chinese student becomes a resident alien of the United States.

没错啊，但是这个treaty是说scholarship或者fellowship不是compensation,比如前面问的opt期间可不可以免5000,如果opt期间拿的不是scholarship/fellowship而是工资，那应该不在这个treaty的范围内。