Tax Day Protest Saturday, April 15, 2017 12:30 PM 4:30 PM 12:30 16:30 City Hall Plaza Boston (map) Google Calendar ICS BOSTON - City Hall Plaza, DEMAND '45' release his tax returns! Cape Bus Info: email email@example.com, and put "TAX BUS" in the subject line. In the body specify the number of seats you'll want/need. (est. $45).