This is a place of business that they have called and left the message that the irs is filing suite against. It is a scam. Irs sends letters they don't call you on the phone or send emails
202-386-0929 I actually called them back. They said yes, who are you? I said, no---who are you? they said their schpeel, I said the IRS would send me a letter and not call.
I finally blocked them from calling me.
They are scum.