It appears that Nas is facing even more financial woes again related to owing back taxes. We reported a few years ago that he needed to pay the IRS more than $2.5 million, but it looks like that amount has more than doubled. TMZ reports that the Queensbridge native now owes upwards of $6 million in back taxes. He also apparently failed to pay $339,000 in federal income tax two years ago and the IRS has subsequently placed on a lien on his property. Jeez.