Useful Items Publication 519   U.S. Tax Guide for Aliens 597   Information on the United States-Canada Income Tax Treaty 686   Certification for Reduced Tax Rates in Tax Treaty Countries Form (and Instructions) 8833   Treaty-Based Return Position Disclosure Under Section 6114 or 7701(b) See How To Get Tax Help near the end of this publication for information about getting these publications and forms. Obtaining copies of treaties. You can get complete information about treaty provisions from the taxing authority in the country from which you receive income or from the treaty itself. You can obtain the text of most of the treaties at www.irs.gov/prod/ind_info/treaties.html. You can also obtain the text of most of the treaties at the following address: Department of Treasury Office of Public Liaison 1500 Pennsylvania Ave. NW -- Rm. 4418 Washington, D.C. 20220 If you have specific questions about a treaty, you can get this information from most Internal Revenue Service offices or from: Internal Revenue Service International Returns Section P.O. Box 920 Bensalem, PA 19020-8518