Called. I don't answer unknown callers. Didn't leave a message. Based on the previous comments, I'm blocking. These folks are too stupid to know that the IRS doesn't make personal phone calls. If you're gonna try and scam somebody, at least check your facts first. PACK OF IDIOTS...
"This call is to inform you that Internal Revenue Service is filing a lawsuit against you to get more information about this case file please call us immediately on our department number at 712-215-4733 repeat 712-215-4733. Thank you."