Oh my gosh!! I just got the same call and called them back just for fun and they told me a warrant had been issued for my arrest and I owed nearly $8000 in back taxes from 2007-2012 :) I told the young Indian fellow they'd just have to come get me :P He hung up after that.
They called me Said I was going to jail and had a warrant for for my arrest. Told me that I owed the irs over Three thousand. Their nuts this ain't my first rodeo I know how the I R S works .
Received two voice mails today stating the IRS was trying to reach me and they were filing a law suit. Tried to call them back to tell them we were calling the real IRS on them. No answer.