What taxes was parliament justified in imposing on the colonist?

Parliament was justified in imposing taxes on the colonists primarily to help cover the costs of the French and Indian War, which had significantly increased Britain's debt. Additionally, taxes such as the Stamp Act and Townshend Acts were seen as a means to regulate trade and assert British authority. However, the lack of colonial representation in Parliament led to widespread resentment and the rallying cry of "no taxation without representation." Ultimately, this tension contributed to the colonies' push for independence.