感谢birth1118同学答疑！
关于第三条，后来发现是我LD理解错了，tax advisor要填的不是W9而是W4 (tax withholding)。我估计是因为W4里的一个要求：If married, but legally separated, or spouse is a nonresident alien, check the “Single” box.
再追问专业人士一个小问题：既然14年我们身份是married，则LD 2014 fall读graduate school缴的学费是否也可在报税时作为减免项？有些地方说是只有绿卡才可以将F1配偶的学费作为减免项，但根据IRS的这个网页 http://www.irs.gov/Individuals/International-Taxpayers/Taxation-of-Resident-Aliens，U.S. resident aliens generally claim tax credits and report tax payments, including withholding, using the same rules that apply to U.S. citizens. including ... education credits ...，看起来resident alien在此方面和citizen是同等对待。我的理解对吗？
