This one's not a joke but it still qualifies for inclusion on this blog: - A film about a tax auditor starring Will Ferrell, Dustin Hoffman and Emma Thompson. It is called Stranger than fiction!
In the film Will Ferrell plays Harold Crick, a tax auditor who lives an excruciatingly well-planned life. He wakes one day to hear a woman's voice narrating his life and, in one disturbing scene, predicting his death. Crick sets out to find out whether he's mad but ends up on a trail that leads him to writer Karen Eiffel (Emma Thompson) - who, as chance would have it, is writing a book in narrative style about the life of Harold Crick, a tax auditor who lives an excruciatingly well-planned life. With his life in her hands, so to speak, their relationship takes a peculiar twist when Harold learns Eiffel's novel is not to have a happy ending.
In an earlier post I listed a number of other films that featured accountants as main characters. Have a guess as to how many are on the list before you check back to see. Please add any others of which you are aware by way of comments. Thanks.