This is the IRS scam. Intimidating you to get money from you. They will swear at you and then threaten you again with legal action. They will also leave a detailed message telling you to get a criminal attorney. IT IS ALL A SCAM. Do not fall for it. ALL Government agencies will send letters and even then double check.
Got an auto recording...called and he claimed I owed the IRS... so thought to myself they notify you by mail as far as I understand and I hung up...sounds like the same people that tried to get me to send them two hundred for eight grand....this fraud is grossly ridiculous