Got the same thing as others have described - computer voice recording left on my answering machine saying it was the IRS and I am about to be charged with tax fraud and "someone from the courthouse is likely going to come arrest me" unless I called this number back. Didn't seem legit for a second.
I just received a phone call from Seattle, Washington two times from a foreign man stating that I owe taxes, I said loudly, "I dont think so" and he hung up on Me.
I got the call as well. He told me I could answer his questions from behind bars. That the sheriff was on his way to arrest me. I should stop asking questions with my smart mouth. I did call our sheriff and report this number.