I also got a call from Officer Sean White from the IRS telling me to call this number back. Yes there was an accent but I could not identify but would not say British or Australian.
Do not call this number back, if the IRS was trying to reach you they would mail something first and the call would come from a line identified as such. Don't be stupid.
I just got a call from Carl cooper with an accent. He said I owed $3000 immediately or I will be deported. I am an American citizen. Where will they send me. What a jerk.