recorded message from "IRS Agent Nikki Johnson" stating to call immediately about a time sensitive issue. voice is obviously a computer generated, googling Nikki Johnson pulls up that this is a scam/bogus call.
An computer generated message from Nicky Johnson with the IRS threatens legal action if you don't call immediately. This is a scam, provide no information but go ahead and call them let them know they're frauds and you know it. Make their lives miserable if you can.