Go to the IRS.gov website under scams. There are two links provided for reporting this. I had 4 calls on my mobile from this number today. I called back & man hung up on me. An hour later, another message from them. I called back, let phone ring for five minutes. No answer. I have filed a complaint with the IRS and FTC.
I keep getting this number also calling me, computer recording claiming to be IRS, going to file a Lawsuit, and saying I need to call this number back....Which I will not...but this needs to stop