The issues with the Stamp Act for the colonists were first that it was a new tax that they had not paid before. However, the larger issue was that the tax was now being collected by Parliament, instead of their colonial legislatures. In the past they were only taxed locally, so they not only elected the people taxing them but had a say in how it was used. When all the tax money was going to local government, the colonists were independent, but the Stamp Act changed all that.
Historically Speaking 