The original television version of the film featured the following disclaimer before the closing credits: "To our Television Audience: In the aftermath of violence, the distinction between hero and villain is sometimes a matter of interpretation or misinterpretation of facts. 'Taxi Driver' suggests that tragic errors can be made.- The Filmmakers."
The closing credits are in alphabetical order by cast names. Thus, Robert De Niro, the star of the movie, is actually listed rather far from the top.