Why were taxes an outgoing source of conflict for the american colonists ?

because the Americans were not represented in the English parliament..

Explanation:

The American were upset by the British government implementing taxes after the French and Indian War.since the British government had debt after the war and relied on the Americans to help pay off the debt because the government was protecting the Americans from the French. when implementing all this the Americans had no members in the parliament to represent them when the English parliament voted on these taxes and this brought about conflict among them.  

the first action that caused many creek indians to turn against william mcintosh was when mcintosh a) supported the united states during the creek war of 1813–1814. b) attempted to stop the sale of creek land to the u.s. government. c) seized control of over 1,000 acres of land belonging to the creeks.

no one really purchased it themselves, it was all america, they had debates etc.