• Operation in administrative tax lawsuits, such as administrative appeals in infraction matters, apart from administrative consultancy for debit installments regarding federal, state or municipal levels;

• Positions and consultancy elaboration concerning tax and legal classification rules applications in particular cases, including the incidence of certain taxes and their constitutionality evaluation;

• Legal lawsuits sponsorship as regards tax indebts repetition, impugnation in tax execution, undue tributes demand, writ of mandamus request, declaratory and tax debit annulment acts, as well as tributary credits surveys (federal, state, and municipal taxes).