Number called and said they were with the department of the treasury and told me to call them back. This was the second call and my last chance, if I don't call them back - then I will have to go in front of a magisterial judge for evading (or something like that).
Didn't call them back - I have no issues with the Dept of the Treasury, and they have never called me before.
Left voice message on my home phone that they were a federal agent and I should phone 301-202-3940 Immediately or be procecuted. I have never been in trouble with anyone. Said they were the Federal Magistrate.