请问什么是W-9S税务文件？

LZ暂时在国内，最近收到以前的学校寄过来的文件，说需要我填写一份税务文件，大意如下：
Per Internal Revenue Service regulations students must provide their SSN or
Individual Taxpayer Identification Numbrr(ITIN) before the 1098-T process is completed to ensure that the From 1098-T information is reported accurately to the IRS for the appropriate tax year,
failure by studentse to provide their United States SSN/ITIN may resuly in a penalty imposed to the student by the IRS in accordance with 26 U.S.Code $ 6109-Identifying Numbers.


这个真的是莫名其妙，我在原来学校的唯一收入就应该是奖学金了，我上网搜了搜也没搜到信息，请问一下，这个W-9S表格到底什么意思，应该怎么填写呢？谢谢！

If you don't have SSN, don't bother

学校要给你发1098-T，所以需要你的ssn
1098－T是申报Federal Education Credit用的，对我们Non-resident Alien都没用
所以这表不理也没所谓