I received a call from this number. A recorded message said: "You have to call immediately the IRS at the number 410 514 6971 for important communication about a criminal charge against you" . I called that number and a man asked my phone number. After few seconds he called me with my name saying that there was a criminal charge against me. He appeared very serious. He asked me to write down his name: Jason Green id # 8159442 criminal investigation division. I asked what it was about. He answered that there was an unpaid balance of $5,900 for tax and that they were issuing a case with criminal charge unless I have paid it. I said that i should have talked first with my accountant but the man said that my accountant couldn't do anything about because I had already the criminal charge. He asked if I could pay that amount now in CASH. I said that I do not go around with $6,000 cash in my pockets. He asked if I can take the money from a cash dispenser. I asked a proof that he was a IRS officer. He started almost screaming with me how I was daring to doubt of him. He said something I didn't understand , probably menacing the prosecution of the criminal charge agains me and closed the communication. I was overwhelmed but I made a search on Google about the 410 514 6971 and I was very happy to discover this page talking about scams with IRS