sKally, Yes, those are the legal cases I found concerning his problems with the IRS.
The Libertarian article that you found, "Facing Bureaucracy", helps explain how he got into trouble with the IRS, but I think Crowhurst compounded his own problems by submitting to the IRS a tax form will all lines blank except for his signature and then requesting a refund of taxes paid.
Also not filing any tax form at all for three consecutive years was not a very good idea!
All to show that it is best to try to avoid the tax man's attention!
There is a book Norman Crowhurst wrote that I think describes his experience fighting the IRS. It is being sold right now by an online used book store and is listed in their economics section.
156038 CROWHURST, Norman. VICTORY OVER THE BEAST'S IMAGE. Springdale: Duverus: 1981. 179 pages. Trade paperback. Appendices. Index. Fine. $35.
http://www.eskimo.com/~recall/cats/economics.htm
Although I would like to read what he wrote, $35 is more than I am willing to pay for this book.
I wonder who might have a copy of his tract, “Disfellowshipped for Believing the Bible”?
--VM44