Official IRS Government site detailing this scam and providing links to report it:
http://www.irs.gov/uac/Newsroom/IRS-Warns-of-Pervasive-Telephone-Scam
I received a call from Nikki Johnson who left me a voicemail to call immediately, that it's the IRS and not to disregard it.
I'm pretty sure the IRS wouldn't be auditing me. They would probably owe me, that's why I knew it had to be a scam.
I kind of hope they call back. I would love to have a little fun with it.
Ah, oh no. How much do I owe? Oh, can I give you my credit card number over the phone? Ready? 9876-5432-0123-4567