Sure, sure
This an India based IRS scam (there are also Pakistan based ones). Do not fall for this. Read http://www.treasury.gov/tigta/press/press_tigta-2014-03.htm
The IRS does not initiate any legal action over the phone. Report it also to your local law enforcement agency. The scammers use magicjack (Ymax corporation) voice over IP lines. This is against this company's terms of use and can lead to termination of their contract. However only law enforcement can initiate the contact with Ymax. Ultimately this is a case for the FBI legal attache in Delhi. but as one proud scammer once said to me over the phone: "Prime Minister Modi will never let you touch us." If you Re really annoyed call or srite to your representative in Congress. As these scams happen all over the country maybe this will trigger a reaction (and the NSA can finally be a force for good).
You guys even type like Indians I believe the English phrase is I do agree and I talked to this Shawn white kept asking if I new anything then said I lived in Knox or whatever his stupid [***] said I got really [***] withhim no one with that accent is named Shawn white