• Advice and planning in matter of federal contributions;

• Advice in matter of foreign trade;

• All types of filings, queries and requests before the tax and custom authorities;

• Follow up the exercise of inspection and verification powers of the tax authorities (home visits, cabinet audits, administrative custom procedure, etc.);

• Defense of taxpayers through the interposition of administrative appeals, annulment trial before the Federal Court of Fiscal and Administrative Justice and amparo trials;

• Everything related with taxes in the Federal District and in the States;

• Social security matter within the jurisdiction of the Mexican Social Security Institute and the Institute of National Housing Fund for Workers;

• Interposition of writ of amparo against laws and regulations of tax matter against the principles of the Constitution.