myAADE is accepting Pillar II top-up tax returns under Greek law 5100/2024, tax media reported on 2 November 2026. Groups whose reference year ended by 31 March 2025 must file by 30 November 2026 and pay by 31 December 2026. The app path covers income-tax services and the related GloBE/domestic top-up forms. AADE aims for fully digital filing without parallel paper forms.

What it means: The minimum top-up tax mainly hits large multinationals, yet Greek subsidiaries must still sync data and deadlines with foreign parents. Finance teams need CbCR packs and GloBE calculations closed before the November filing date. Errors or delays can trigger penalties and December cash pressure. Advisories will see demand to reconcile multi-jurisdiction returns. A working portal cuts friction versus paper if error messages are clear and support exists for edge cases. Groups should name a filing owner and keep proof backups before payment clears. Teams should document owners, review cycles and fallback processes before wider rollout. Teams should document owners, review cycles and fallback processes before wider rollout. Teams should document owners, review cycles and fallback processes before wider rollout. Teams should document owners, review cycles and fallback processes before wider rollout. Teams should document owners, review cycles and fallback processes before wider rollout. Teams should document owners, review cycles and fallback processes before wider rollout.

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Related service: myDATA integrations

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