We have two services for tax-related information. Although there is a lot of duplication, each service also provides full-text for journals (Omnitax Library has journals from its parent company publisher CCH; Thomson Reuters Checkpoint has journals from the publisher Warren, Gorham & Lamont).
Each also has its own citator service.
There are a lot of possibilities here, so this will only be a short list of stuff that amuses me! I used to have an intro clip of the movie A Taxing Woman, sadly no longer available. But be sure to watch it, it's really good. Otherwise, of course there's The Beatles' song The Taxman!