Answered the phone at work, automated recording of "Officer Heather Grey/Gray" with the IRS. Told to call back regarding urgent matter. I Google'd the number and found this thread. I reported the call to: https://www.treasury.gov/tigta/contact_report_scam.shtml
If you receive this message, please report using the link directly to the US Treasury's website.
I received a vm stating that this is an urgent message and don't disregard. This is officer Hannah Gray with the internal revenue service. You must call back before we take action.