The tax team at BKM Berkemeyer is led by tax specialists Federico Valinotti and Mauro Mascareño. The firm is involved in shaping tax legislation, assisting the National Chamber of Commerce and Services of Paraguay with amendments, and helping several companies challenge the constitutionality of new legislation. 

Over the research period, the team advised 30 companies in filing an unconstitutionality class action against the last paragraph of section 15 of the Tax Reform Act which violates several Paraguayan constitutional principles. The ruling by the Supreme Court is currently pending.