I received a call from this Number telling me I am under investigation. He was foreign and just informed me that I may be fined up to 50000 and prison time. I hav attempted to contact the irs to verify the investigation and I can't get anyone to answer the phone.
Got a similar call, claiming that i'm about to get arrested for tax evasion. Said that i made a mistake on my taxes and owe them more than $9000. Heavy Indian accent and lots of bs about helping me work out a deal now. BEWARE! IRS never calls by phone!!