They called and said there was a warrant on my back taxes and said I had to pay now or go to jail.

They are THIEVES--- not the treasury and there is NO warrant for you. IGNORE the call.  The real IRS mails letters if there is a problem.

This number called my mother, stated that she owed money, and they said would be prosecuted. I decided to call them back, and have been calling and harassing them, as they have harassed her. Everytime i tell them that i am her lawyer, they hang up. There is zero possibility that these phone calls are of any legal consequence. Simply, tell them you have your own lawyer, and they will most likely hang up.

Thank you

Exact voicemail  (visual voicemail } copied)
"Hi, this is the tax crime investigation unit as IRS. The reason you are receiving this pre, recorded message is to notify you that IRS has issued an arrest warrant against you right now you and your physical property those are being monitored and it's very important that I do hear back from you as soon as possible before we proceed further in any legal matter my direct call back is"
And it cut off!
It's a HUGE SPAM! Someone should notify IRS of these morons calling and threatening ppl 3-5 times a day.