Taxpayer Rights in Tax Audits: An Evaluation from the Perspective of Legality, Proportionality, and Trust Principles
Taxpayer Rights in Tax Audits: An Evaluation from the Perspective of Legality, Proportionality, and Trust Principles
1) Introduction: The Balance Between the State's Supervisory Authority and the Taxpayer's Fundamental Rights
Tax audits, as defined in Article 134 of the Tax Procedure Law (VUK) , are technical administrative procedures carried out to determine whether taxes due have been correctly assessed . However, since this procedure is carried out using public authority, it is directly related to the fundamental rights and freedoms of the taxpayer. While ensuring tax security, the audit must also consider constitutional rights such as legal certainty , predictability , privacy , and property rights .
Therefore, the concept of "taxpayer rights" is not only a protection against administrative arbitrariness, but also a constitutional guarantee that reinforces the legitimacy of the tax system and the taxpayer's trust in the state.
2) Legal Basis and Purpose of Tax Audits
2.1. Legal Basis
Tax audits Articles 134–141 of the Tax Procedure Law .
Article 134 clearly states:
"The purpose of a tax audit is to investigate, determine, and ensure the accuracy of taxes that should be paid,"
he says.
This provision grants the administration the authority to conduct investigations while also providing a safeguard for the taxpayer: the scope of the investigation cannot be expanded beyond its intended purpose.
2.2. Limits of Tax Audits
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Purposefulness: The audit may only be conducted for the purpose of investigating the accuracy of the tax.
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Scope definition: The review must be limited to a specific tax type and period.
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Jurisdiction rule: Only tax inspectors, assistant tax inspectors, and Revenue Administration audit personnel may conduct the audit (Tax Procedure Law, Article 135).
Within this framework, taxpayers have the right to appeal, both through administrative channels and judicial channels, against any action that exceeds the limits of their legal authority
3) The Taxpayer's Fundamental Rights During the Audit
3.1. The Right to Information and to be Enlightened
According to Article 140 of the Tax Procedure Law, the taxpayer is notified of the subject, period, and scope of the audit before the audit begins . This notification must include the following elements:
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The identity of the inspector who conducted the inspection,
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The type of tax under review,
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Review period,
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Requested ledgers and documents.
It must also be clearly stated what information and documents the taxpayer must submit at this stage and within what timeframe . Otherwise, the investigation will be considered to have been initiated unlawfully .
3.2. Right to Defense and Opportunity to Present Statements
The tax audit report prepared at the end of a tax audit does not directly result in tax and penalties. First, a pre-assessment settlement or explanation request mechanism is activated. The taxpayer has the right to respond to the findings on which the report is based:
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Submit additional documents or explanations,
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Objections to calculation and determination errors,
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to seek a settlement or explanation .
This of the right to seek justice, enshrined in Article 36 of the Constitution, in tax law.
3.3. Protection of Intellectual Property and Trade Secrets
In tax audits, the disclosure of a taxpayer's trade secrets or personal data is prohibited under Article 5 of the Tax Procedure Law (Tax Confidentiality) . Audit personnel are obligated to keep all information they learn confidential . Failure to do so will result in both disciplinary action and criminal liability under Article 239 of the Turkish Penal Code .
In this respect, tax audits are directly related to the KVKK (Law No. 6698) . The financial, identity and transaction data of taxpayers are considered " personal data processed as required by law "; these data must be stored securely , limited to the purpose , and must not be shared with unauthorized persons .
3.4. Reasonable Review Period
Article 140 of the Tax Procedure Law stipulates that audits be completed "as soon as possible .
This provision proportionality and administrative efficiency .
If the audit period exceeds reasonable limits, the taxpayer will face the following consequences:
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Uncertainty in the business world,
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Damage to commercial reputation,
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Psychological pressure and financial losses may result.
The principle that "prolonged investigations cannot disrupt the taxpayer's business life" has also been established in the decisions of the Council of State.
3.5. Conducting the Inspection at the Taxpayer's Premises
Inspections are, as a rule, conducted at the taxpayer's place of business (Tax Procedure Law, Article 139).
However, if the workplace is unavailable or at the taxpayer's request, they can also be conducted at the tax office.
This provision avoid disrupting the taxpayer's work routine and protect their privacy .
3.6. Right to Have a Representative or Agent
Taxpayers a lawyer, financial advisor, or legal representative .
This is a natural extension of the right to defense.
Correspondence and documents submitted through a representative are also legally valid.
This right the administration's practice of requesting information without question .
4) The Problem of "Disproportionate Intervention" in Tax Audits
4.1. The Principle of Proportionality
In tax audits, the government's request for information is not unlimited.
The administration more information or documents than necessary .
For example, requesting both e-ledger, printed ledger, and bank statement for the same period a duplicate information request .
4.2. Decisions of the European Court of Human Rights and the Constitutional Court of Turkey
The European Court of Human Rights' decision in "Gasus Dosier-und Fördertechnik/Netherlands" establishes the relationship between property rights and taxation:
“Tax collection is legitimate for the public good, but it should not impose an excessive and personal burden on the individual.”
Similarly , in its decision numbered 2018/123 E. – 2019/67 K., the Constitutional Court emphasized that “obligating taxpayers to request information and documents cannot create an excessive burden.”
5) Remedies in Case of Violation of Taxpayer Rights
5.1. Administrative Application
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Complaint to the Tax Audit Board Presidency,
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the Taxpayer Rights Unit of the General Directorate of Revenue (GİB) ,
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Notification via the Presidential Communication Center (CIMER)
5.2. Judicial Application
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Pre-assessment/post-assessment settlement,
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Annulment lawsuit in the Tax Court (Administrative Procedure Law, Article 2),
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The appeals stage at the Council of State.
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The Constitutional Court may hear individual applications when necessary (right to property, reasonable time, fair trial).
5.3. Importance of Evidence
To prove the violation:
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Investigation correspondence,
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The minutes that were taken,
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Notification dates,
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Authorization documents,
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GIB portal records
can be used as evidence.
6) European Union and OECD Practices: A Comparative Look
The OECD's "Taxpayer's Rights and Obligations Charter" summarizes taxpayer rights under four main headings:
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The right to information
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The right to fair and impartial treatment
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The right to privacy and data protection
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Right to appeal and judicial review
In European countries (especially Germany, France, and the Netherlands), taxpayer rights are codified as the " Taxpayer Bill of Rights ." In Turkey, a similar structure was created with the Taxpayer Rights Declaration of the General Directorate of Revenue (2011) ; however, it lacks binding force
7) The New Dimension of Taxpayer Rights in the Digital Age
E-ledger, e-invoice, e-notification, and electronic inspection processes have enabled tax audits to be moved to the digital environment.
However, this development has also brought new risks:
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Data security,
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GDPR compliance,
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Cyber access authorization limits,
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Disproportionate risk assessment in digital inspection algorithms.
Therefore, the following measures are recommended to protect taxpayer rights in the digital environment:
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The principle of transparent algorithms in auditing software ,
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Data anonymization and log recording,
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Electronic signature and password security measures.
8) Conclusion: The Bridge Between Effective Auditing and Trust-Based Taxation
Tax audits are the sharpest instrument of the state's financial control power; however, this power must be balanced with taxpayer trust . An audit that does not protect taxpayer rights weakens its legitimacy , even if it is legally valid .
A reminder of the main principles:
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Legality: The basis for the authority must be clear.
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Commitment to the purpose: Data should not be collected for purposes other than the research objective.
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Moderation: One should not impose more burden than is necessary.
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Confidentiality: Tax information should not be disclosed.
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Judicial protection: Effective avenues of redress must be available.
Respecting taxpayer rights in tax audits not only protects the individual but also voluntary tax compliance . When the state's auditing power trust a culture of fair taxation becomes permanent.
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