Did not answer. They left message to call them back saying we are under investigation for tax fraud by department of Treasury.. I always thought they sent a letter not called..
Got an automated message from someone giving some kind of ID number and saying there's been tax fraud committed in my name and failure to respond will result in prosecution in federal court. No way they'd send an auto-dialer robot for that kind of message (nor have I ever committed tax fraud, lol). Definitely a scam trying to get you to panic and call back to give out your personal info.
Just received the automatic "Federal" call about fraud committed in my name. Funny at the end of message they say "hope to hear from you soon". Hahaha.