IRS Publication 17
Title ‘Your Federal Income Tax’, Publication 17 is the most important IRS publication that you can have available while preparing your income taxes for 2009. This publication is available in a number of different formats including online, in a PDF, and in printed format.
The two electronic versions of Publication 17, the online version and the PDF version, have a multitude of links to other useful information and making getting the best answers to your questions easy and quick. And not only does the IRS have information on tax laws that have been in existence for decades, but the publication also has information on tax laws that were just passed last year. This recent information is very valuable and can increase your return significantly.
There are two languages available for the publication including Spanish, if English is not your first language. To get an electronic copy of the publication go to the IRS.gov website. Printed publications can be ordered by calling the IRS at 1-800-829-3676.