2026-05-18 ZEFIR2 - difficulties in submitting tax declarations and applications on May 19, 2026.

Published: 18.05.2026 12:54 (Warsaw time)

Updated: 20.05.2026 10:21 (Warsaw time)

Due to scheduled maintenance, all services of the ZEFIR2 system will be unavailable for tax declaration submissions on May 19, 2026. This includes declarations for excise tax, gaming tax, and VAT, among others.

Unavailability starts on May 19, 2026, at 19:00.
Expected end of unavailability is May 19, 2026, at 23:00.
Services affected include declarations for excise tax, gaming tax, and VAT-14.
Users will be informed of any changes to the downtime schedule.

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