This number has called at least 4 times today and scared my PREGNANT mother into a Panic Attack. These people are set up in India trying to scam you for money DO NOT, I repeat DO NOT give any information to these people. They will call from multiple numbers and area codes. They will try to scare you into giving info saying things of such, "Your taxes were done wrong." "That if the call disconnects they will place a warrant out for your arrest." Etc. This is all fake, they are just scams.
If the IRS really wanted to contact you they do it via MAIL or they have a 1-800 number. Hope this helps anyone who are receiving these nasty calls.