Which act started the parlament did have the right to tax colonists?

The Stamp Act of 1765 was the first significant legislation that asserted Parliament's right to tax the American colonists. It imposed a direct tax on a wide array of printed materials, including newspapers and legal documents, leading to widespread protest in the colonies. This act marked a pivotal moment in colonial resistance, as it was seen as a violation of the principle of "no taxation without representation." Ultimately, the backlash against the Stamp Act helped galvanize colonial unity against British rule.