Received same call from alleged officer Julie Smith or IRS, claiming urgent matter that extremely time sensitive and to call back immediately before start legal actions. Received identical message a couple hours apart. Figured it was a scam, and other posting here would appear to confirm. Also found a recent article about these scams in the Chicago Tribune http://www.chicagotribune.com/news/ct-tax-sca ... 0812-story.html
The article refers to an IRS website to report such scams. http://www.treasury.gov/tigta/contact_report_scam.shtml.