Caller ID says MARTY5 DTYHDT. The voice mail was a partially-cut off robocall. Out of curiosity I called back and reached what sounded like a call center where the phone was answered "IRS" -- total scam. I said ' *expletive* this is NOT the IRS....and hung up.
Warned that IRS is filing suit pending tax delinquency and I have 45 minutes to pay by credit card, but provided no substantiation for balance claimed due.