Answer:
Since Britain had to pay their war debts, they decided that they had the right to tax the colonies, which they did through:
1) the Stamp Act-tax on stamps for legal documents, and the Townsend Acts-colonists were required to pay taxes on imported goods.
Colonists were unhappy with these because the acts were passed in Parliament without them having any say in the matter.
2) An event that negatively affected the relationship between the two is the Boston Massacre-British soldiers shot at colonists, (and killed a few in the process), all due to a confrontation between a group of soldiers and a mob of colonists. This was used as propaganda by the colonists to show the British as the aggressors.
3) The Boston Tea Party-even though Parliament repealed most of the taxes, they kept the tax on tea. At that time, the colonists wanted to trade with other countries instead of just England, so the new tea tax angered the colonists to the point that they dumped all of the tea into the Boston harbor. This was the main turning point of the relationship between England and the colonies.
Hope that helps.