On 24 September 2026, the National Tax Agency (NTA) announced the completion of the National Tax System Renewal, a major infrastructure overhaul affecting all electronic filing (e-Tax) and payment channels effective from September 2026. This renewal mandates changes to the data formats and layouts of major tax return forms, including Corporate Tax, Consumption Tax, and Income Tax returns. The NTA has released updated form specifications (XML schemas) and scheduled mandatory maintenance windows for the e-Tax platform. Tax software vendors and large corporations using proprietary filing systems must update their systems to comply with the new schemas to avoid transmission errors during the upcoming filing seasons.
Key Takeaways
- Mandatory Form Layout Changes: All statutory tax return forms have revised XML schemas; legacy formats will be rejected by the e-Tax gateway, requiring immediate updates to ERP tax modules and commercial tax software.
- e-Tax Maintenance Schedule: Published a detailed calendar of system downtimes through March 2027; corporations with fiscal year-ends in September to December must plan filings around these blackout periods.
- Enhanced Security Protocols: The renewal introduces stricter TLS 1.3 enforcement and mandatory IC card reader updates for electronic signatures, impacting IT infrastructure budgets for tax departments.
Disclaimer: This article is compiled and summarized by the AI based on publicly available information and is for general information purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. Please consult a qualified professional tax advisor or legal counsel for tax advice.
Source: Read Official Announcement