Here's the link to their yahoo finance page: http://finance.yahoo.com/q?s=TAXS.PK
The delisting blurb: Delisted from OTC Kind of reminds of missing a deadline with the IRS for your client. Hmm.
Taxmasters was the only tax resolution company that had their shares traded on a stock exchange (that I am aware of).
Other articles on Taxmasters here: Chilling: The Tapes of the Closers