I got the same call on Friday afternoon, at 4:50 Omaha time, which would be 10 minutes til 6 east coast time. What made me think the call was fraudulent was the fact that the caller said she was from the Internal Revenue Services (Services, plural). She also referred to a lawsuit and said it was the final notice and that I must call 571-290-2051 immediately.
Report the Calls to the real IRS here:
•report the incident to the Treasury Inspector General for Tax Administration at 800-366-4484.
•You can also file a complaint with the Federal Trade Commission at FTC.gov. Add "IRS Telephone Scam" to the comments in your complaint.
******
Do consider maybe getting a call blocking device or phone.. You can google them and many are around $50.00 or so.If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.