This was a call purportedly from the IRS threatening a lawsuit. They wanted me to call back--what I got was a recorded message. The call back number, I BELIEVE I GOT IT RIGHT is 424 356 3250
I got a call from 424-356-2540. A canned message said the IRS was going to sue me. This is a scam. I called back a guy who couldn't speak English answered as the Internal Revenue Service. Don't give these people your information.