There is a fairly common IRS or "tax scam" being practiced by scammers in both Canada and the USA.
USA tax payers should read this:
http://www.irs.gov/uac/Newsroom/IRS-Reiterate ... -Telephone-Scam
Same [***] he is an of middle eastern . Robo call irs .legal action up. I got him on th he phone . I simply asked him for his address hung up m........ fuc..... I keep calling bsck and he will block me .