Hello.
I am a Chinese researcher, doing a postdoc in US, holding a J-1 visa, and entered US on Sep 26, 2007. But my tax treaty is expired on June 12, 2008 and I can not be exempted from tax again. I don't know why it is expired within a year. I ever stayed US holding a J-1 visa during March to June 17, 2005 for only three months. So how does it calculate the three year for tax exemption? Thanks.