Federal Tax Lien Against Nas It Was Written

10/19/2009 1:52 AM PDT

isn't the only person trying to get money from Nas -- turns out Uncle Sam is too!

TMZ has obtained a federal tax lien filed last month against Nas for a whopping $2,584,206.31. Looks like Nas didn't pay his taxes in 2006 and 2007.

Nas is currently involved in a bitter divorce battle with Kelis. Looks like she'll have to wait in line.