Your Trusted Ally for Tax, Regulatory, and Transactional Success

Why TENA?

TENA is a reliable partner that both corporations and individuals turn to when facing tax, regulatory, or transactional challenges.

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Our Expertise

With our tax litigation practice recognized as one of the most prestigious in our country, our firm is built on the following three pillars:

Tax Law

Administrative Law

Corporate Law

Our Foundations

The following principles not only guide our professional conduct but are integral to our daily commitment in all that we do.

Grounded in Expertise, Soaring in Service

Supported by strong ethical principles, our commitment is to provide legal services of the highest quality, blending innovation with tradition.

We place our clients and their matters at the center, but we also prioritize the people who make up our team. Human talent is our most valuable asset.

Embracing
Teamwork

We go beyond the ordinary.

Our strength lies in our ability to respond quickly and efficiently, both in timing and execution, by effectively allocating our resources and expertise to solve the cases presented to us.

Our Work
Defines Us

We speak through results and concrete actions.

Consistency, hard work, and dedication are our constants, driven by a strong conviction to always strive for excellence.

Commitment to
Strong Values

At TENA, we strive to reflect our essence in our actions.

Integrity, confidentiality, experience, and dedication are fundamental to who we are.

"Rafael Tena Castro is a spectacular lawyer with lots of business knowledge. He resolves all of our issues quickly and he is disciplined and kind. I have nothing more than good things to say about him."



Chamber and Partners
Latin America 2025

Latest News and Publications

Amendment to the Regulatory Law of Article 105 of the Political Constitution of the United Mexican states

On April 3, 2025, the “Decree amending and supplementing various provisions of the Regulatory Law of Sections I and II of Article 105 of the Political Constitution of the United Mexican States” (the “Decree”) was published in the Official Gazette of the Federation (by its Spanish acronym “DOF”).  The Decree modifies key provisions governing actions of unconstitutionality and constitutional controversies filed before the Supreme Court of Justice of the Nation (by its Spanish acronym “SCJN”).

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New Federal Law for the Protection of Personal Data held by Private Parties

On March 20, 2025, the “DECREE enacting the General Law on Transparency and Access to Public Information; the General Law for the Protection of Personal Data held by Obligated Entities; the Federal Law on the Protection of Personal Data held by Private Parties; and amending 37, Section XV of the Organic Law of the Federal Public Administration” (the “Decree”) was published in the Official Gazette of the Federation (“DOF”).

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Implications and perspectives on the amendment of the Amparo Law of March 13, 2025

On March 13, 2025, the “Decree amending and repealing several provisions of the Amparo Law, Regulatory of Articles 103 and 107 of the Political Constitution of the United Mexican States” (the “Decree”) was published in the Official Gazette of the Federation (“DOF”, by its acronym in Spanish), where several provisions of the Amparo Law were amended.  These changes impacted both the wording and content of several articles, as well as their consequent application.

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