Same happened to us. Returned from a camping trip to a message with this number saying it was a final notice from the IRS for a lawsuit. When was the last time the IRS made a call like that without a certified letter to your home? Knew right from the start is was a fake.
i played along till I was transferred to pay. I knew it was a scam. I told him I wanted to pay full 14k he said he asked for last 4 of social. I made one up. He said yes that's correct. He said get cash out from bank and then call back and he would give me bank number to deposit. I then said just issue me and the arrest warrant and then he said ok and hung up. 5 minutes later got another call from a 202 number with same recording. Hope no one falls for this SCAM!