All international students in F and J status (and dependents) must file a tax document with the U.S. Internal Revenue Service (IRS)
Regardless of whether you were paid wages or not, you must file a tax document if you were present in the U.S. between January 1 and December 31, of the tax year and remain "exempt" after applying the rules of "substantial presence test." If you would like a general overview of the U.S. taxation process, please see the following guide published by NAFSA: Association of International Educators: NAFSA Tax Brochure. Another important governmental resource, though dated, is still helpful in understanding your responsibilities with regard to U.S. taxation: http://www.irs.gov/pub/irs-pdf/p519.pdf.
If you need to file U.S. Federal Tax (Form 1040NR or 1040NR-EZ), you may use the Foreign National Tax Resource linked above. Any student who has access to iStart may utilize Windstar Foreign National Tax Resource. Any international student in F or J status who has access to iStart may utilize the tax preparation software to prepare federal non-resident alien tax forms.