The Internal Revenue Service, IRS , is the revenue service of the United States federal government.
Krusty gets in trouble with the IRS and they siege all his ownings. Homer and Marge get audited by the IRS. In addition, Homer had enough hatred of the IRS that, when their cab during their visit to Washington D.C. was stalled by traffic and Marge pointed him to the IRS building, he immediately took the opportunity to poke his head out of the window and loudly boo them, with one of the people working there telling him to "boo" himself.
- Episode – "Mr. Lisa Goes to Washington"
- Episode – "Bart the Fink"
- Episode – "A Tree Grows in Springfield"
- Video game – Tapped Out