That might have something to do with the two fires his tax records were eaten up by.

As Forbes reports:

Indeed, on two prior occasions he suffered inconvenient fires that destroyed records.

It's a little like the crash of Lois Lerner's hard drive. Those fires destroyed Mr. Sharpton's financial records just as he was about to turn them over to officials. And records are key to tax disputes. As Mr. Sharpton works through his tax problems with or without records, he appears to have a suit made of Teflon, even when it comes to taxes.

http://americanprosperity.com/al-sharptons-secret-method-to-avoid-paying-taxes/