Mechanical voice. Caller says they are the IRS. Filing lawsuit against me. SCAMMERS! Do not respond. IRS does not call to tell you this! These people want to scare you and steal your $.

Yes, someone calling me with the same storyline:  IRS is suing you, call this number.  If IRS is having trouble with you, they will send you a letter, not call on the phone with a message like this.  They have called three or four times today.