72‑Hour e‑Declaration Suspension by GIB: What It Means for Tax Filing Flow

The Revenue Administration announced that from 00:00 on Saturday, 1 August 2026 until 23:59 on Monday, 3 August 2026, the submission of Summary and Premium Service Returns via the Digital Tax Office (DBS), e‑Declaration System and Internet Tax Office will be temporarily suspended.

Technical Maintenance Scope and Affected Services

■1 August 2026 – 3 August 2026 a 72‑hour scheduled technical maintenance window

■Affected services: Summary and Premium Service Return, Digital Tax Office (DBS), e‑Declaration System, Internet Tax Office

■The Administration stated the suspension is part of system updates and data integrity checks within the e‑Declaration infrastructure.

Implications for Tax Compliance and Businesses

■Large taxpayers may experience a temporary disruption in their monthly filing obligations

■Small businesses and freelancers might need to resort to paper returns or proxy filing, increasing administrative burden

■The Revenue Administration emphasized that a rapid restoration team is already on standby to bring services back online.

Expected Outcomes and Restoration Plan

■Upon completion, systems are promised to be swiftly reopened

■Planned infrastructure upgrades aim to boost login speed and cut error rates, enhancing user experience

■Long‑term target: achieve 99.9 % uptime for the e‑Declaration platform.

Hakan Çelik: While such scheduled technical downtimes are necessary to improve the operational efficiency of tax administration, they can create liquidity pressure on taxpayers during periods when cash‑flow management is critical. The Administration’s commitment to transparency and rapid restoration will be pivotal in maintaining market confidence.