Board Thread:Tapped Out Help/@comment-173.75.246.3-20130710213811/@comment-24335865-20150518230510

Town Hall quests first need to be completed, the the new task chains for level 21 can be found here : Muntz Quests. Bart's will trigger "Any Given Weekday" and Martin will trigger next 2 quests, "Nerds Gone Wild" then "Nelson" which consist on Building Muntz House that will unlock Nelson.