Got the same thing. It is an IRS imposter scam. I kept calling back after I reported the number to the IRS website. He said he would keep calling me back and called me and all Americans "White monkeys with Black [***]".
I did too and I could barely understand the guy. He was trying to tell me that the IRS is auditing me from the years 2011 - 2015 because there may have been a glitch showing that I didn't pay my taxes. The minute I asked for his supervisor he hung up.
Got the same thing. It is an IRS imposter scam. I kept calling back after I reported the number to the IRS website. He said he would keep calling me back and called me and all Americans "White monkeys with Black [***]".