2014 Proposed Federal Budget of the United States
To understand where your federal income tax money goes, you'd have to read (several times) the 244 pages of the 2014 Budget of the United States Government. Or you could take a look at this chart, which visualizes the budgets for all departments in a uniquely revealing look at our national priorities.
This chart depicts the President's budget request for 2014. The center circle is the discretionary budget: spending that must be approved by Congress every year. It is paid for largely with your federal income taxes and includes all departments within the federal government: a uniquely revealing look at our national priorities (by jess.)