Beginning in 2006, Chimicles & Tikellis LLP, along with co-counsel, filed telephone tax refund claims on behalf of taxpayers in the City of Los Angeles, the County of Los Angeles, and the City of Long Beach, California, alleging that telephone taxes had been improperly collected on certain local and bundled telephone services to which the tax code did not apply. The refund claims were denied and Chimicles & Tikellis filed three class action lawsuits seeking to recover the allegedly improper taxes.

On July 25, 2011, Chimicles & Tikellis and its co-counsel won a major victory in those actions when the Supreme Court of California unanimously held that taxpayers are permitted to file telephone tax refund claims on behalf of a class of taxpayers in one of the three lawsuits, Ardon v. City of Los Angeles. The lawsuits are ongoing.