TAX LAW
AND TAX LITIGATION

Legal support in tax matters, defence in tax proceedings and representation in litigation with the Tax Authority, with rigorous support for individuals and companies.

Need legal support?

Get in touch with our team for clear, rigorous legal support tailored to your case.

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The Experience Behind Our Practice

Over 30 Years of Consolidated Experience

With more than three decades of legal practice, we combine strong legal knowledge, extensive practical experience, and a mature understanding of the challenges faced by businesses, individuals, and investors.

Rigorous Legal Expertise with Close Client Support

Every case is handled with attention to detail, technical precision, and strategic focus, ensuring personalized and close support throughout every stage of the process.

International Presence and Coordinated Legal Assistance

Through a network of strategic partnerships across Portuguese-speaking and European markets, the firm provides coordinated legal support for both national and international matters and operations.

TAX LAW
AND TAX LITIGATION

Tax law and tax litigation play a central role today in the life of any business and in the protection of taxpayers, against a backdrop of growing legislative complexity, stronger enforcement, and higher demands when it comes to meeting tax obligations. Acting in a preventive and technically grounded way is essential to reducing risk, anticipating problems, and responding properly to decisions of the Portuguese tax authority.

In a law firm based in GuimarĂ£es with a practice in tax law and tax litigation, legal support in this area is not just about reacting to problems that have already arisen. It is just as important in preventing disputes, looking at how transactions sit within the tax framework, interpreting tax rules, and setting the right strategy in the face of inspections, tax adjustments, additional tax assessments, or enforcement proceedings. Legal work here can cover personal income tax (IRS), corporate income tax (IRC), VAT (IVA), municipal property tax (IMI), property transfer tax (IMT), and Stamp Duty, as well as the taxation of capital gains, tax benefits, the tax liability of managers and directors, tax-related administrative offence proceedings, and the enforced collection of tax debts.

In tax litigation, the support of a lawyer is especially valuable when filing administrative complaints, hierarchical appeals, requests for the review of tax acts, oppositions to tax enforcement, and judicial challenges. For anyone looking for a tax lawyer in GuimarĂ£es, it is essential to have close, careful guidance focused on the effective defense of your financial and business interests.

Qualified legal advice in this area helps strengthen legal certainty, limit exposure to risk, and improve the chances of a favorable outcome.

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Situations where legal support is essential

Tax inspections and notifications from the tax authority

When a taxpayer is the subject of a tax inspection or receives notifications that meaningfully affect their tax position, legal support is essential to assess the legal framework, prepare the right response, and protect their rights from the outset.

Additional tax assessments

Where there are additional assessments of personal income tax, corporate income tax, VAT, or other taxes, it is important to look at whether the act is lawful, what it is based on, and whether there are grounds to respond through the administrative or judicial routes set out by law.

Tax enforcement, seizures, and enforced collection

When a tax debt has already moved to the enforced collection stage, legal support makes it possible to assess whether there are grounds to oppose enforcement, suspend the process, regularize the debt, or defend against seizures that are unlawful or disproportionate.

Tax-related administrative offence proceedings

Proceedings opened over alleged tax infringements call for a careful look at the facts, the taxpayer's responsibility, and the lawfulness of the procedure, and a properly mounted legal defense makes all the difference.

Subsidiary liability of managers and directors

When the tax authority seeks to hold managers or directors personally liable for a company's tax debts, specialist legal input is essential, with close attention to the legal conditions for that liability.

Tax planning and the tax framing of transactions

Before going ahead with certain deals, transfers of assets, corporate restructurings, or investments, legal advice on tax matters helps prevent unwelcome surprises, reduce risk, and ensure compliance with the applicable law.

Tax litigation in court

Whenever it becomes necessary to challenge a tax act in court, being represented by a lawyer experienced in tax litigation is essential to setting the procedural strategy, building the legal foundations of the client's case, and putting on an effective defense.

In-Person or Online Legal Support

Do you need legal support?

Schedule a consultation with our firm and receive clear, professional guidance tailored to your case.

About Us

More Than Three Decades of Strategic Legal Practice

Armandino Lopes Advogados is a law firm headquartered in GuimarĂ£es, with offices in Porto and Maputo, founded in 1995. With more than three decades of activity, the firm combines consolidated legal experience with an international outlook, advising businesses, private clients, and investors in Portugal and across Portuguese-speaking markets.

We operate in the areas of Civil Law, Tax Law, Administrative Law, Commercial Law, Labour Law, Insolvency and Corporate Restructuring, Family and Succession Law, and Foreign Investment — with particular relevance in tax litigation and the defence of companies before the Tax Administration and Social Security.

Through a network of partnerships with law firms in Vigo, Madrid, Paris, Luanda, SĂ£o Paulo and Macau, we assure our clients coordinated legal support in the markets where they operate or intend to invest.

Rigor, proximity, and results. That is what defines us.

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Sectors of Activity

A Rigorous Legal Approach, From Assessment to Representation

1.

Assessment

We begin by understanding the facts, reviewing the documentation, and identifying legal risks, relevant deadlines, and the full scope of the situation.

2.

Strategy

We define the most appropriate approach for the case, based on the client’s objectives, the applicable legal framework, and the best way to protect their interests.

3.

Action

We handle the matter with technical rigor, whether through negotiation, contract drafting, document regularization, dealings with public authorities, or litigation proceedings.

4.

Ongoing Support

We keep the client informed and supported throughout every stage of the process, with close communication, clarity, and a focus on achieving a legally sound solution.

In-Person or Online Legal Support

Rigor, experience and confidentiality

Schedule a consultation with our firm and receive clear, professional guidance tailored to your case.

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Frequently Asked Questions

  • When should I turn to a tax lawyer?

    ï‚·Whenever you are facing a tax inspection, an additional tax assessment, tax enforcement proceedings, a seizure, tax-related administrative offence proceedings, or any other situation with a meaningful tax impact. Stepping in early tends to strengthen the taxpayer's ability to mount a defense.

  • What is tax litigation?

    ï‚·Tax litigation is the set of legal routes that allow a taxpayer to respond to acts of the tax authority, whether through administrative channels or in court. It includes, among other things, administrative complaints, hierarchical appeals, oppositions to tax enforcement, and judicial challenges.

  • Can a tax assessment be challenged?

    ï‚·Yes. Whenever there are legal grounds to question whether an assessment is lawful or correct, the taxpayer can use the routes of response set out in the law, within the applicable deadlines.

  • Can a lawyer assist with tax enforcement proceedings?

    ï‚·Yes. A lawyer can look at how the debt arose, check whether the process is lawful, file an opposition where there are grounds to do so, and guide the client through ways to regularize the debt or defend against seizure measures.

WE DEFEND THOSE WHO BUILD. WE PROTECT WHAT MATTERS.
EVERY CASE IS TREATED AS IF IT WERE THE ONLY ONE.

Frequently Asked Questions

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What types of legal matters does the firm take?

The firm provides legal support to both individuals and businesses across a wide range of practice areas, including civil, tax, real estate, commercial, corporate, employment, family, criminal, and administrative law, among others. In many cases, legal assistance goes beyond court proceedings and may also include contract review, dispute prevention, document regularization, negotiations, legal opinions, and strategic guidance before any important decision is made. When a matter requires more specific legal analysis, the best approach is to briefly present the situation so the firm can assess whether it falls within its areas of practice and determine the most suitable form of legal support.

Appointments can be scheduled through the contact details available on the website, namely by phone, email, or contact form. During the initial contact, the aim is to gain a general understanding of the nature of the matter, the urgency of the situation, and whether it is appropriate to proceed with a legal consultation. During the consultation itself, an initial assessment of the case is carried out, including the available documents, potential risks, legal options, and possible next steps. This stage is important because it allows the client to better understand their position and make decisions with greater confidence and clarity.

Legal fees always depend on the nature of the matter, the level of complexity involved, the time required, the urgency of the situation, the volume of documentation, and the type of legal support requested. In some cases, the client may only require a consultation or a one-time legal assessment, while other matters may require ongoing assistance involving multiple procedures, meetings, negotiations, or court intervention. For this reason, fees can only be accurately determined once there is a sufficient understanding of the case. The most important thing is that the client understands, from an early stage, how the service may be provided and under which conditions.

Yes. Whenever the nature of the matter allows it, legal support can be provided remotely through video calls, telephone, email, and digital document sharing. This option is especially useful for clients living outside Portugal, emigrants, foreign investors, or individuals who, for professional or personal reasons, are unable to attend the office in person. Depending on the type of matter involved, it may also be possible to act through a power of attorney and handle the case in Portugal without requiring the client’s constant physical presence.

You should gather all documents directly related to the matter in question, such as contracts, notifications, letters, emails, certificates, decisions, proof of payment, records, identification documents, and any other materials that may help clarify the facts accurately. The clearer and more complete the documentation provided, the more useful and objective the initial assessment will be. Whenever possible, it is advisable to send the most relevant documents in advance, as this allows for better preparation ahead of the consultation and reduces the risk of important information being overlooked.

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Take the first step with confidence

Contact our firm and present your situation with the confidence of being supported by an experienced legal team.

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