The deadline for submitting the DAC9/GIR tax service is approaching on June 30, 2026. This obligation applies to all corporate groups that are subject to the global minimum tax framework introduced by the 2023 Act LXXXIV. The service must be filed through the NAV DACentral portal, either by uploading a validated XML file directly or via the M2M API. The XML format follows strict specifications defined in the DCC-API documentation, which is publicly available at https://nav-gov-hu.github.io/DCC-API/. Companies need to ensure that their data conforms to the required schema, including identification of ultimate beneficial owners, financial statements, and relevant tax identifiers. The submission must be completed no later than the last day of June 2026, and any late filing may result in penalties as stipulated by the tax legislation. The NAV provides a user guide and a set of technical documents to assist taxpayers in preparing the file, including detailed instructions on how to generate the required XML payload, validate it against the XSD schema, and upload it through the portal’s interface. Additionally, taxpayers can request assistance from the NAV help desk or send inquiries to the dedicated email address [email protected]. The deadline is part of a broader effort to implement the OECD’s Pillar Two measures, ensuring that multinational groups pay a minimum tax rate of 15 % on their global profits. Failure to meet the filing deadline may trigger a tax audit and possible interest charges on any underpaid tax. Therefore, businesses are urged to review their obligations now, finalize their documentation, and submit the required information before the end of June to avoid any adverse consequences.