Called told me about federal chargers. Appears to be scam as it requires "Immediate" call back. The voicemail it left me was a computer generated voice as well.

Returned called was Indian voices online and in back ground said was IRS scam

Same experience as earlier callers -- message saying federal charges were being levelled against me and to call to clear up the matter. However, I called back from a dummy number. After about 20 rings, a voice with an Indian accent answered saying "Thank you for calling the IRS. This is John Matthew. Can I help you?" He went into his script about how I owe back taxes. So I asked him to tell me the social security number on the file. He kept saying, "Sorry, can you repeat that?" I don't think he spoke much English. Eventually, he hung up after about the third time I asked him for the SS# on the file. Obviously, a scammer -- but a good target for one of those self-styled humorists who like to record such interactions and put them on YouTube.

Same exact experience. I'm not even calling back. Any serious call from the IRS about federal charges would have a person talking and would give a case #.

JUST SO EVERYONE KNOWS... IRS do not call you. I repeat, IRS DO NOT CALL YOU. Reasonable people understand it's a scam, but, unfortunately, a lot of gullible people out there give our their life-savings. Once, again. If it's an IRS issue, they will mail you the package. They would NEVER CALL YOU. As a matter of fact, any time you receive a "collections" call of any kind, ask them to mail you the required paperwork and only then you would be willing to make a payment. A real collection company will always do that. Hope someone finds this information helpful.