It is a scam artist pretending to be the IRS. They will harass you repeatedly, and if you call back asking them to remove your number, a nasty Indian man will speak to you in a dirty and sexual manner (if you're a woman, anyway).
It is a scam artist pretending to be the IRS. They will harass you repeatedly, and if you call back asking them to remove your number, a nasty Indian man will speak to you in a dirty and sexual manner (if you're a woman, anyway).