This is one of those IRS calls that is fake

Fake IRS call that left message.   If IRS wants to contact You, it will NEVER be by phone per IRS policy

IRS phone scam.  Actually left a voice mail demanding i call them back.  (I didn't.)    Just an FYI, my local Sheriff told me to report it to the IRS (just go to their website) even if you didn't give out any personal info.  The local PD doesn't take a report unless you are an actual victim (i.e. you fell for it).

Left a threatening message that IRS will be suing me.