This is a scam out of lndia. If you call them back to have some fun, block your number and don't give it to them when they ask. It's actually entertaining to listen to them in their broken English claiming to be an "IRS Officer" (not agent).
Called 2 times . The caller claimed to be an agent from the IRS, he had a very thick Indian/Pakistani accent. Was very explicit that if I do not comply with their instructions I will be arrested. There has been so much discussion about this particular scam in that the IRS never calls all communications are via US mail. After the threat of being arrested I told the individual to stop calling me!