This number has called me as well and said the same thing. This is the IRS and he also left a name (Jason Miller) clearly he wasnt a Jason Miller, with such a strong accent. First of all the IRS would not call you personally, they send you letters and notices if something is up. I know this because my cousin works for the IRS. This is totally a scam or a bad debt collector trying every means possible to get your attention.
Client called me in a panic to follow=up. This is a scam - check the IRS web site and search for phone scams.
Have some fun. Tell them all your $ is tied up in CDs. Tell them the bank needs a $200 fee before they will release the funds. Ask that they send you the $200, add it to your bill, and you'll send them the full amount. Scam the scammers, call them back and waste their time. Contact the IRS and tell them about it.