Voice mail was without accent about IRS criminal case and "legal action against you". When I called back, it was in a strange accent, reminded me of young Muslims in Afghanistan (I served there 5 years ago, lost three dear friends).
I asked him if he was Afghan or [***], and he went silent for a while, then came with a load of abusive words, which I had heard in Afghanistan. Must be some terror gang operating somewhere. Who knows. God what a world we live in.
Obviously nothing to do with IRS. This is a scam. Ignore them. If you pay, you feed the Islamic extremists.