We should repeal all federal income taxes.  Income taxes are a great evil that has changed the nature of our relationship with government.

Instead, the federal government should be funded through a capitation (per-person) tax payable proportionally by each state. That is, our states would be responsible for collecting a tax calculated based purely on their own population counts, and each could collect the money in the way it deems best.

While their geographies, populations, and resources might make different forms of taxation preferable across the states, my generic preference is for a property tax collected at the municipal level and then paid upward to the state as the means of state funding.

The value of the government is the value of being within its borders, and its revenue should be directly related to that value, with as few subjective or confounding factors as possible. Why should we be taxed on income or production (sales)?