Two robocalls from the same number today for an IRS phishing scam. It felt lovely to report them to the IRS and the Treasury Inspector General for Tax Administration.
If you (in the USA) get a call from someone claiming to be from the IRS or the Treasury department, get the number, get the name if possible, and give them NO financial information about yourself.
The actual government will send you letters. The actual government will government will send you lots of letters before anything gets serious. These people are phishers who got your name from the same places telemarketers always do, and are trying to scam you (in my case, probably from my resume on a jobsite).