What required colonist to attach tax stamps newspapers and legal documents?

The act that required colonists to attach tax stamps to newspapers and legal documents was the Stamp Act of 1765.

This act, passed by the British Parliament, imposed a tax on all printed materials in the American colonies. To prove the tax had been paid, colonists were required to purchase a stamp and affix it to the document.

This act was extremely unpopular among the colonists, sparking protests and boycotts that ultimately contributed to the American Revolution.