有tax treaty的前提是，你只是“temporarily present in the United States” 既然你已经结婚了，不是temporary在美国，这一点就不能满足了，就不能用treaty了。schedule OI item C要你填Have you ever applied to be a green card holder, 以下是instruction:
Item C
If you have completed immigration Form I-485 and submitted the form to the U.S. Citizenship and Immigration Services, you have applied to become a green card holder (lawful permanent resident) of the United States.
欢迎其他mm一起讨论，我要说错了请轻拍。。。俺也不是专家，就是好奇查查