Defend and represent the applicant for the service who is affected by resolutions or acts issued by tax and customs authorities, as the case may be, through the filing of the corresponding administrative appeal, contentious administrative trial and/or direct and indirect amparo trials.

Resolutions or acts of the tax authorities (SAT, IMSS, INFONAVIT, ISSSTE, CONAGUA and Finance Ministry), such as tax credits, refunds, non-existence of operations, immobilization of accounts, cancellation of stamps or any other related. And from the National Customs Agency of Mexico in relation to customs clearance.

As well as, advise and investigate the problems of the interested party regarding acts of those authorities where their fundamental rights are affected, offering, where appropriate, alternative solutions and explaining their legal scope.

And provide a clear and concrete response on regulatory interpretations of tax and customs provisions that are involved in the act of authority that is the subject of the consultation.