The Greek Independent Authority for Public Revenue (AADE) is set to open its electronic portal for tax submissions on March 16, 2026. Taxpayers participating in the automated submission system are advised to meticulously review their E1 form codes to avoid discrepancies that could lead to additional tax burdens. If all details are correct, a single click will finalize the submission; however, failure to act will result in the submission being automatically processed after Easter by the AADE.

Taxpayers should be particularly vigilant, despite the convenience of pre-filled forms. They are still responsible for checking their data to ensure accuracy and mitigate any potential financial repercussions. Errors, omissions, or deficiencies in the submitted data can be rectified through a modification return, maintaining the integrity of the tax submission process.

Key areas requiring close attention include reported incomes and tax withholdings. The myAADE application provides a comprehensive view of income and tax withholdings as reported by employers and insurance agencies. It is essential for taxpayers to be aware that certain codes are 'locked,' and any inaccuracies can only be amended through the entity that issued the certification by submitting a new file. This highlights the importance of accuracy and the potential complications that can arise if necessary corrections are not made timely.