Tax Authority Services

Prepare for tax authority procedures with our expert support.

Comprehensive support before, during, and after tax audits

K-X Consulting provides complex solutions for companies at every stage of tax authority procedures. Whether it is a Tax Authority (NAV) audit, an application for payment relief, litigation, or a PEI (Enhanced Oversight) investigation, our experienced experts speak the language of the authorities.

Our consultants identify potential tax risks in advance, assist in developing the appropriate documentation and processes, and expertly represent our clients’ interests throughout all phases of tax proceedings—from routine audits to specialized regulatory investigations.

With the support of K-X Consulting, your company can face the tax authority prepared and with confidence.

Ensure smooth and compliant tax proceedings for your business with guidance from our specialists.

Pre-Audit Services

Confident preparation for tax authority procedures.

Representation During Tax Audits

Comprehensive professional support throughout the tax audit to ensure a successful outcome.

Post-Audit Representation

Expert assistance in managing legal remedy and appeal procedures.

Procedures related to payment relief

Effective solutions for reducing financial burdens.

Support for NAV PEI (Enhanced Oversight) Procedures

Ensuring compliance with Anti-Money Laundering and Counter-Terrorism Financing (AML/CFT) regulations.

Special Procedures

Comprehensive assistance with tasks related to irrecoverable debts

Partner-KX-Control

Vetting of suppliers and subcontractors to ensure regulatory compliance

Support for Gambling Authority

Successful navigation of regulatory requirements for gambling market participants

Tax Litigation Representation

Expert tax law support throughout the entire litigation process

Take the first step — we’ll take care of the rest.

If you’re not looking for empty answers but expect real solutions, feel free to contact us by filling out the form.

Our goal is to help you navigate risks and opportunities inherent in the tax system while providing practical, tailored solutions that help you achieve your objectives.

Contact Us

Pre-Audit Services

Ensure your company’s readiness before a tax audit begins.

 We often see that timely preparation almost always leads to a much more favourable outcome in a tax audit. This is why we believe that proper preparation is crucial before an audit occurs. Preliminary reviews and necessary corrections can significantly reduce risks and potential penalties. To this end, we audit our clients’ operations, identify tax risks, and assist in rectifying errors and gaps, as well as preparing documentation and records—all before any official audit begins. Our goal is to ensure our partners face any regulatory procedure with confidence and well-documented support.

Why is preliminary preparation important?

Avoidance of penalties

Avoidance of penalties

Mitigating the risk of legal consequences

Confident presence before the authorities

Ask for our expert support and let’s prepare together for full compliance!

Get in touch with an expert at K-X Consulting

Dóra Kardos

Senior Tax Manager

Representation During Tax Audits

With our expert presence, we provide a solid foundation during tax procedures

We have seen countless times that from the very start of an audit, the representative’s personality, preparedness, and proficiency in tax authority procedures have a decisive impact on the final findings. Therefore, depending on our client’s needs—whether through direct power of attorney or providing background support—we assist in all types of tax authority audits (supporting procedures, data reconciliation, compliance reviews, retrospective audits, and pre-refund audits), as well as representation before local municipal tax authorities. We provide comprehensive professional support throughout the audit—including the preparation of statements, review of documents, and participation in personal meetings—as well as offering office facilities for hosting tax inspectors. We build a complete strategy for every phase of the audit; our professional presence reduces stress and increases the chances of a successful outcome.

Why entrust us with your company's representation during a tax audit?

Proficiency in tax authority procedures

Strategic thinking

Confidence throughout the process

Risk mitigation

Reduction of administrative burdens

Request a proposal now and take advantage of our professional support.

Get in touch with an expert at K-X Consulting.

Dóra Kardos

Senior Tax Manager

Post-Audit Representation

Comprehensive experience in legal remedy solutions

In legal remedy procedures, a well-chosen strategy is of paramount importance. This is why it is worth turning to a specialist who can read between the lines of the tax authority’s findings. If the audit report, or the first- or second-instance decision, contains findings against your company that are open to challenge, our experienced consultants will assist in managing the legal remedy procedures (objections, appeals, lawsuits, etc.), developing opportunities for personal consultations, and preparing other tax authority requests such as payment relief or equity petitions.

Why should you entrust us with your post-audit representation?

Strategic thinking

Experience in legal remedies

Helping achieve a positive outcome

Personalized consultations

Comprehensive support

Ask for our expert support and shape your company’s tax future with confidence.

Get in touch with an expert at K-X Consulting.

Dóra Kardos

Senior Tax Manager

Procedures related to payment relief

Helping you find the best solutions to reduce financial burdens

Businesses often feel overwhelmed when faced with a tax authority finding, as they may not be fully aware of their rights and options or how to exercise them most effectively. In the event of liquidity difficulties, we help you navigate your choices and take the burden of preparing payment relief applications (for instalments, deferrals, reductions, or waivers) off your shoulders. This includes the preparation of legally required financial plans. Our goal is to ensure our clients are relieved from immediate payment obligations within a compliant framework.

What tasks do we perform?

Selecting the appropriate type of payment relief

Professional preparation of applications

Submission of applications to the tax authority

Preparation of legally required financial plans

Client representation before the Tax Authority (NAV)

Monitoring the fulfilment of the granted relief

Request our support to navigate difficult financial periods transparently, compliantly, and with the minimum possible burden.

Get in touch with an expert at K-X Consulting.

Dr. Ivett Deák

Legal Counsel, Tax Manager

Support for NAV PEI (Enhanced Oversight) Procedures

Support for the Department of Anti-Money Laundering and Counter-Terrorism Financing (PEI) procedures

In recent years, the transparency of corporate financial flows has come into sharp focus. Consequently, many sectors that previously did not consider it necessary must now address client due diligence requirements. As a supervisory body, the Tax Authority (NAV) is increasingly strict in auditing compliance with legal obligations. Our service is designed to support compliance with anti-money laundering and counter-terrorism financing (AML/CFT) regulations. Audits conducted by the NAV Enhanced Oversight (PEI) department follow specific procedures and fall under exceptionally strict regulations. Our experts assist in preparation, the drafting and assembly of necessary documentation (developing internal policies and risk assessment systems, identifying ultimate beneficial owners, and establishing client monitoring systems), creating compliant record-keeping procedures, as well as providing on-site representation and taking legal remedy steps if necessary—ensuring our clients act safely and in full legal compliance.

What does our service provide?

Professional preparation

Preparation of required documentation

Establishment of compliant record-keeping procedures

On-site representation

Ensure your company’s regulatory compliance with guidance from our experts. Contact us today.

Get in touch with an expert at K-X Consulting.

Dr. Ivett Deák

Legal Counsel, Tax Manager

Special Procedures

Compliant and efficient administration for irrecoverable debt VAT recovery

Businesses often overlook the opportunity to retrospectively reduce their VAT base under the title of irrecoverable debts. Most companies are unaware that they do not have to forfeit VAT amounts “stuck in the budget” simply because the debt was declared irrecoverable only after the statute of limitations for performance and payment had expired. Similarly, there is no need to abandon claims that qualify as irrecoverable due to circumstances arising for a closed period following a tax audit. Our service provides comprehensive assistance in the VAT audit of irrecoverable debts, determining the method of recovery, verifying the necessary documents, preparing applications, and managing communication with the tax authority. We provide targeted support in special cases, such as recovering VAT for irrecoverable debts relating to periods already closed by an audit or expired under the statute of limitations. These procedures require high-level professional attention, which our experienced team provides to ensure efficient and compliant administration. Our goal is to find a legal and risk-free solution for retrospective tax base reduction.

We provide comprehensive assistance in the following areas:

VAT audit of irrecoverable debts

Determining the method of recovery

Verification of required documentation

Preparation of applications

Liaison with the tax authority

Contact us to find out more.

Get in touch with an expert at K-X Consulting.

Dr. Ivett Deák

Legal Counsel, Tax Manager

Partner-KX-Control

For reliable business relationships

Tax authority audits triggered by anomalies in the supply chain are becoming increasingly frequent, often resulting in penalties for innocent or inattentive parties. This is why we emphasize that every company needs at the very least a basic level of partner control. Our service performs partner control reviews based on tax authority expectations, thoroughly vetting selected suppliers and subcontractors using information available from the invoice recipient’s side. We verify whether partners are listed in international databases and check for any indicators of tax evasion. Each review is documented in a traceable manner that is verifiable before the tax authority, and we provide a formal written professional report. Our service also extends to the design and review of the entire partner due diligence process. Partner control not only facilitates NAV audits but is recommended for any new or significant cooperation. Upon request, we also provide thematic on-site training to optimize internal processes and raise risk awareness.

When do we recommend our Partner-KX-Control service?

Before establishing new or significant business relationships

Prior to tax authority audits

To minimize partner-related risks

If a partner is missing from international databases

To review the risks of ongoing collaborations

Contact us to find out more.

Get in touch with an expert at K-X Consulting.

Dr. Ivett Deák

Legal Counsel, Tax Manager

Support for Gambling Authority

Helping you prepare for Gambling Authority audits

Gambling operators must meet unique requirements while maintaining constant readiness for strict audits by the supervisory authority. Our consultants, equipped with practical experience, assist in preparing for regulatory audits, fulfilling documentation and reporting obligations, and addressing all questions arising during the process, including every stage of legal remedy procedures. In short, we ensure that the outcome of your audit is not left to chance.

Support for gambling authority audits requires specialized expertise and experience:

Specific regulatory environment

Enhanced oversight by the authorities

Complex documentation requirements

Specialized legal remedy options

Unconventional procedures

Don't leave your tax affairs to chance! Request our expert support and be fully prepared for the tax authorities.

Get in touch with an expert at K-X Consulting.

Dr. Ivett Deák

Legal Counsel, Tax Manager

Tax Litigation Representation

Effectively supporting your company throughout all stages of litigation

In disputes with the tax authority, representing a case before the court is the true “deep end.” Whether a case is to be argued before domestic courts or the Court of Justice of the European Union (CJEU), experience shows that a favourable ruling is only possible with specialists who know the details of the case as intimately as the finest points of the relevant legislation. Should a tax procedure enter the judicial phase, our specialized attorneys and consultants provide coordinated support during tax litigation and preliminary ruling procedures before the European Court. We prepare the client, draft the legal submissions, and provide representation throughout the entire duration of the lawsuit. From the start of the tax audit through every stage of the tax authority and administrative litigation proceedings, our clients are in safe hands with our tax lawyers.

We provide complex support in the following areas:

Expert preparation

Preparation of legal submissions and briefs

Representation throughout the entire litigation process

Liaison with the authorities

We work tirelessly to protect our clients’ rights. If you require expert support, our experts are here to help.

Get in touch with an expert at K-X Consulting.

Dr. Ivett Deák

Legal Counsel, Tax Manager