 Income tax 2021-2022, marginal and average tax rates. Get ready to get refunds to the max, diving into income tax 2021-2022. As we have seen in prior presentations, the federal income tax system in the United States is a progressive tax system, meaning we have different layers involved, we have different tax rates, the rates going up as income levels go up. But we also talked about the idea that progressive can be a term that's going to be relative as well. So in other words, although we would basically categorize the federal income tax system as a progressive tax, we can imagine a tax being more progressive, possibly by having more layers that would be involved or possibly by having bigger increases in the amounts as we go from one layer to the other. We can imagine a tax being less progressive, having less layers involved. We can also use the other term, which is often compared in contrast.