Got the calls too, but blocking it does not help because they use different numbers. At least in my case I've received the same message from several different numbers.
scam, scam, scam,,,,,and a lame one at that.... same bs recorded message supposedly from treasury dept. Take note,,any official legal action taken where you are involved will involve official notification by USPS with explanation and the appropriate departments and phone numbers for you to contact for further information. If I had//wanted to waste a few minutes I might just call them back to play with their heads and egg them on....nothing like screwing with a scammer for a little comic relief.
I have received several calls and some were slightly different from others. All were with Indian accent. I agree that the feds and state officials don't call you. They mail letters. Also, booking the calls will not help cause they use different numbers. You'll end up filling you Blocked Call list but they will use another one.