caller said it was IRS and I was being sued by them

This is another IRS scam. Having dealt with the IRS for about 30 years, the agency does not contact you by phone on the initial contact. it is always by mail not only to protect the person, but to provide a paper trail for the government and the taxpayer.

Auto call message rolled to voice mail on 10/21/15 @ 3:03PM....  Female voice stated I am being sued by the IRS and to call 317-560-2732 (CallerID showed Cellular Caller) .  I have received many of these calls recently on different cell phone numbers...  Reported to https://www.ftccomplaintassistant.gov/#crnt&panel1-1

called and left voicemail about being sued by the IRS

Same Scam.  Reported to represent the IRS, demanded money