Why were patriots upset about the Tea Act?

American colonists were outraged over the tea tax, which had existed since the 1767 Townshend Revenue Act and did not get repealed like the other taxes in 1770, and believed the Tea Act was a tactic to gain colonial support for the tax already enforced.

 Colonial tea merchants were angry because they got cut out of the tea trade and could not make any money, which represented in British Parliament they didn't have a say on how they should do the taxes.

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