The year 2026 isn't just another cosmetic change to tax regulations. It's the moment when the relationship between companies and the tax administration undergoes a permanent transformation. The tax authorities are increasingly less likely to act solely "after the fact," and increasingly more likely to analyze data in an ongoing, automated, and systematic manner.
The digitalization of taxes means that it is no longer just a matter of whether the tax has been paid, but also what data the office has, when it receives it and how it interprets it .
Invoice as data, not a document
The introduction of the mandatory National e-Invoice System means that an invoice is no longer a file sent to a contractor. It becomes a structured economic event that enters the public administration system.
For companies, this means change in several key areas:
the moment of issuing and delivering the invoice is no longer dependent on e-mail circulation,
sales, adjustments and complaints must be synchronized with accounting systems,
Emergency procedures and offline modes become part of everyday risk management.
KSeF impacts not only accounting but also sales, customer service, and IT. This is an organizational change, not just a technical one.
Accounting books as an analytical source
The next step in digitization is the transfer of accounting records in the form of structured SAF-T files for income tax purposes. Tax authorities gain access to accounting data in a form that allows for automated analysis.
In practice, this means that:
the consistency of accounting policy and account structure is becoming increasingly important,
descriptions of economic events must be clear and logical,
data quality in the accounting system becomes an element of tax security.
The books cease to be documents “for inspection” and begin to function as a current source of information.
The end of random correspondence with the office
Digitalization also extends to communication with the administration. Electronic deliveries are becoming the primary communication channel, with deadlines counted from the moment of successful delivery in the system.
For companies, this means the need to organize:
responsibilities related to the receipt of correspondence,
responsibility for responding to official letters,
internal circulation of information and documents.
Failure to respond to the letter will no longer be a matter of “organizational oversight”, but a real procedural risk.
Access to the office is based on permissions, not signatures
More and more tax matters are being handled electronically. This means that access to the office depends on properly assigned permissions, authorizations, and roles in the systems.
In practice, companies must ensure:
clear rules for granting and revoking permissions,
control of access to tax systems,
cooperation with advisors and accounting offices in a secure model.
Lack of appropriate authorizations can paralyze operations at a critical moment.
Data, analytics and faster tax response
Digitalization also means greater risk analysis capabilities for the tax administration. Data from invoices, ledgers, and reporting systems allows for the rapid identification of irregularities and unusual patterns.
For companies this means:
less tolerance for inconsistencies,
greater importance of ongoing transaction control,
the need to respond quickly to errors.
In practice, tax risk increasingly materializes not during a classic audit, but in the form of actions taken based on data analysis.
What does this mean for boards in 2026?
Technological changes mean that taxes are no longer the exclusive domain of the accounting department. In 2026, organizational decisions made at the management level will become crucial.
In particular:
taxes become a continuous process, not a one-time settlement,
the integration of financial and sales systems becomes an element of compliance,
internal control returns to the role of a real risk management tool,
2026 is a time of stabilization before the full sanctions regime in the following years.
How to prepare your company for tax digitization
Companies that want to navigate 2026 with confidence should approach tax digitization systematically. This includes analyzing invoicing, accounting, document flow, and communication with government agencies.
Grażyna Janowicz, a tax advisor and certified auditor, provides training and consultations for companies wishing to consciously prepare for the changes resulting from tax digitization. Her support covers both formal issues and practical adaptations to the new reality.