Dane Cook -- California Made a $500,000 Mistake

5/21/2010 4:10 AM PDT
Dane Cook is taking on the State of California -- claiming the Tax Board made a mistake that could have cost him more than half a million bucks.

The State of California has issued a tax lien against Cook for $515,430.43 in unpaid taxes and penalties from 2005, 2006 and 2007. As of this morning, the lien is still "active."

But Dane tells TMZ the lien "was erroneously filed by the State of California" and adds that "they are in the process of removing this mistaken lien from their records."