From MTO: EXCLUSIVELY learned that Lauryn Hill was slapped with more another tax lien by the IRS .... this after already serving a 3 month sentence in federal prison for failing to file taxes for the years 2005, 2006 & 2007

The IRS filed a new lien on January 7th in New York Court ... which accuses the singer of failing to pay over 860k in taxes for the years 2006-2010

The document states Lauryn failed to pay the following 2005 ($422,008.26), 2006 ($19,838.75), 2007 ($61,158.50), 2008 ($58,405.71), 2009 ($30,370.91), 2010 ($13,247.73) & 2011 ($261838.19). The total for 2005-2011 is $866,868.05 in unpaid taxes

Lauryn could face more time behind bars if she doesn't figure out a way to pay off the newly discovered tax debt.