Automated message saying to call back about your case file.

We've been trying to contact you.  This is a final notice.  The IRS is preparing to file a lawsuit against you. (No mention of my name, a case number or any other kind of identifier.  Called back, no answer, voice mail full.)

Reported these clowns to the Florida Attorney General's Office.

Automated message about a case file.
Total scam

Automated call about a case file. SCAM.