As the saying goes, nothing is certain in life but death and taxes. But how well do you really know the agency that collects your federal taxes the Internal Revenue Service (IRS)? Most of US only hear from the IRS twice a year when we get our tax forms and when we get our refund. But what about sides of the IRS you've never seen? Take a look inside IRS processing facilities. Join special agents as they learn interrogation techniques that help them catch the tax cheats. And learn how it turns out when someone challenges the idea that we owe income taxes at all. Experience the challenge of collecting trillions in taxes from hundreds of millions of taxpayers... Inside the IRS.