Went to voicemail but reported they were the IRS - final warning - lawsuit and asked me to call them back at 202-600-0539. This is an obvious scam as the IRS wouldn't call if they were going to take me to court for something.
Same scam, stated IRS is suing me. I am not concerned. This is a scam. Pretty sure they would have kept my tax return if they were going to sue me. So sad!