Check out Monopoly: Income Tax Edition:

This is a fairly easy Monopoly game expansion to teach youngsters the principles of filing and paying income tax. It includes an income tax form on which players keep track of income and deductions, figure and pay their income tax at the end of each circuit of the board. Players may opt to hire themselves out as tax preparers and those who do not wish to file their own returns may hire and pay tax preparers to do so, the cost of which is tax deductible, of course.

I absolutely love this warning:

Please note that this is not a representation of real-life tax preparation. It is a simplified simulation meant to educate children on the basic principles of income and taxes and should not be taken as a source for tax preparation information.

(Hat Tip: Sarah Lawsky, Jim Maule.)