What crucial organization was formed to organize protest against british taxation it eventually evolved into a set of shadow government?

The Continental Congress was initially formed in response to the passage of the Intolerable Acts (laws passed by the British Parliament meant to punish the Massachusetts colonists for the Boston Tea Party).

The Congress met from 1774 to 1789 three times. At the first one, in 1774, Benjamin Franklin convinced the colonies to form a representative body.