i too am getting sick of these calls started call blocking with my phone service but they use different numbers for calling all start with 360 that's WA state.
Businesstaxnews.com 360-322-6989
Called me twice within an hour...............
Something about if you owe back taxes they can help. Did the "add your number to our do not call list" deal. We will see if that works........................but probably not.
You can report them to the Federal Trade Comission. Go to this site: http://www.ftc.gov/ftc/contact.shtm and scroll down a little to the header "National Do Not Call Registry" And report the violation.