Hello Ann. Go to www.donotcall.gov which is the National Do Not Call Registry and register your phone number (home or cell). Scammers may still call you from time to time but this website works very well to avoid any unwanted calls.
Received an automated message stating something to the affect of ... "This is a final notice from the IRS. The IRS is filing lawsuit against you. To get more information about your case file, please call Department # 206-445-0663."
Of course I did not return the call. I googled this number. Read on another website where someone had returned the call and the "scammer" stated that they would settle the case if he would immediately send $2500.
I just received a call from 206-445-0663. They were posing as the IRS and saying that I defrauded them and was going to jail. Said I under reported and owed $7906.