While the King of England appointed governors over the 13 colonies, each colony essentially ruled itself. The British governors ensured that taxes were paid to England under orders of the king.
By the time the American colonies were prepared to revolt, they had long been used to electing their own legislative assemblies. While allowing the colonies to self-govern saved England a great deal of trouble, it also allowed for the development of leaders and political structures that provided the basis for the creation of the American Constitution. When these colonial assemblies began to question the increasingly oppressive taxation required by the king and implemented by the governors and their tax collectors, the main arguments for the American Revolution took shape.