does not leave a message

They say the IRS want to sue me when asked why she tried to give me conformation number of my case I don't even have a case file my taxes every year so why wouldn't I get something in the mail from the irs to tell me about this law suit it's a scam beware

I also got a call from 213-304-6594 stating that there was a law suit against me.
And i should contact this number.  Its a scam.