The CINTAX site is currently closed for users but will be available in early 2010 for the 2009 tax year.
CINTAX Complete International Tax Preparation Software is a tax return preparation software program designed exclusively for foreign students, scholars, teachers, researchers, trainees, and their dependents who are nonresident aliens to aid in preparing U.S. federal income tax forms.
NOTICE to all CINTAX users: If your CINTAX tax return has been rejected or if you have received a letter from the IRS asking for clarification or a request for more information, you should contact the CINTAX Support Center at the following address: support@cintax.us (CINTAX will need a copy of the IRS letter and the tax return as submitted - students SHOULD NOT send their SSN/ITIN, these numbers should never be sent via email or fax to anyone.)