I was called from the following phone number: 1-321-352-5198, which I later found out to be associated with the Ymax Oration Landline in Orlando, Fl. A person with very heavy accent threatened me that I am under federal investigation for miscalculation on my tax return and an arrest warrant was issued. I wanted to speak with someone else and he transfered me to a person who claimed to be head officer. He repeated the same (same heavy accent) and told me that I have to pay $600 to avoid the arrest. I was asking him questions about why I did not receive any correspondence from IRS, how come they represent IRS by the phone, etc. but he refused to answer any of those. Finally, he said he will not listen to me and I hang up.