There are three levels of governments in the US: federal, state, and local.
The following table shows current revenue for federal, state and local governments, and also
total overall revenue.
You can look at details of the data here. You can look at
deficits here and debt here. You can create custom charts
here and download data here.
You can look at the federal budget here. You can take a course in taxes here.
On July 15, 2014, the Congressional Budget Office released its annual Long Term Budget Outlook, which projects federal spending and revenue out into the 2080s. As before, the CBO study shows that federal health-care programs will eat the budget.
UsGovernmentspending.com has updated its chart of the CBO Long Term Budget Outlook here. You can download the data and also view CBO Long Term Budget Outlooks going back to 1999.