Simpsons Season 9, Episode 20: The Trouble with Trillions

Forgetting to do his annual income taxes until the night they are due, Homer rushes to fill out his forms with false information. Soon after, he is arrested for tax fraud, but makes a deal to work for the FBI for immunity from the IRS's prosecutions. After a successful operation made by Homer, the FBI decides to have Homer obtain a one trillion dollar bill that is in the hands of Montgomery Burns.