Ican list grievances in the declaration of independence

Violations against English constitutional law

Cutting off colonial trade with other countries

Depriving colonists of a fair trial by a jury of their peers

Transporting colonists to England for trial with biased juries

Altering the structure of colonial government

Sending the British Army to the Colonies to bring about destruction

In a nutshell, Thomas Jefferson and his fellow Patriots believed that the King had exceeded his constitutional authority, and that under ''Natural Law'' the Colonies had the right to form a new government.

In the Declaration of Independence, Thomas Jefferson provided a list of "facts to be submitted to a candid world" to demonstrate that the British king had been seeking to establish "an absolute Tyranny over these States" (the colonial states which were declaring their independence).  

Jefferson's list of grievances included concrete reasons for action against the British, such as:

The king refused to assent to laws that were wholesome and necessary for the public good.The king had forbidden colonial governors to enact laws or implement laws without his assent (which, as the prior point noted, he was in no hurry to give).The king forced people to give up their rights to legislative assembly or forced legislative bodies to meet in difficult places that imposed hardships on them.The king dissolved legislative assemblies and then refused for a long time to have other assemblies elected.The king obstructed justice in the colonies and made judges dependent on his will alone for their salaries and their tenure in office.The king kept standing armies in place in the colonies in peacetime, without the consent of the colonial legislatures.The king imposed taxes without the colonists' consent.

These and additional items listed in the Declaration were meant to support the colonies' position that tyranny was standard operating procedure by the British monarchy, and therefore revolution was justified.