Katt Williams likes to slap Target employees, throw cigarettes at women, and fight other comedians, but he might not want to go up against Uncle Sam.

The troubled comedian has been hit with a tax lien, of just over$4 million. Uncle Sam filed the lien against Williams, claiming the comedian failed to pay $3.2 million in taxes in 2008 … and also bailed on another $829,352 in 2009.

It’s not the first time Williams has been accused of stiffing the Feds — back in 2010 the IRS filed another tax lien against the comedian totaling $284,000 … mere pennies compared to the new bill. Williams is set to appear in Scary Movie 5, due out next year.