Got the message too. I've heard about these in the past, but I didn't think it would happen to me, so when I listened to that voicemail, I started panicking, but immediately thought to Google this number. The lady didn't even give her name OR say mine, which I thought was weird. I was being audited for tax evasion and if I didn't call immediately, the damages would escalate. Reported the number to the IRS and FTC.