- From September 2025, the validation rules for the NAV Online Invoice system will become stricter. The changes will affect not only invoicing software but also accounting and taxation processes. New rules can be tested from September 1, 2025, allowing companies and developers to prepare. The aim is to ensure more accurate and reliable invoice data, benefiting both the authorities and businesses. The changes include the introduction of new WARN messages, the removal of some existing WARN messages, and the conversion of some WARN messages to ERROR messages, which will block data submission if not corrected. The NAV has specified which warnings will become blocking errors, such as issues with performance period dates, missing elements in XML, and incorrect tax markings. These changes necessitate a review of invoicing processes.
Source: grantthornton.hu
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.
Latest Posts in "Hungary"
- Hungary Clarifies VAT Reverse Charge Rules for Construction and Installation Services
- Tax Authority to Audit Retail Stores in Bács-Kiskun County, Focusing on Receipts and Employee Reporting
- Hungary Mandates Detailed M-Sheet VAT Deduction Reporting from July 2026; Full Digital Shift Ahead
- Hungary Unveils ViDA Plan: Mandatory E-Invoicing and Major VAT Reform Announced
- Hungary Retires ÁNYK: Preparing for Digital VAT Returns and Enhanced Compliance in 2026
