E-invoicing

myDATA

The Greek digital bookkeeping platform of the tax authority AADE, where invoices and accounting entries are reported electronically.

What myDATA means

myDATA (my Digital Accounting and Tax Application) is the platform through which Greek businesses transmit the data of their issued invoices, received documents and accounting classifications to the tax authority. The reported data pre-fills the VAT and income tax returns, and a discrepancy between the books and myDATA triggers checks.

Reporting is done by certified e-invoicing providers, by accounting software connected to the API, or manually through the portal for very small volumes. Greece is extending the system with a B2B e-invoicing mandate phased in during 2026, alongside Peppol for the actual exchange of the invoice. Kontevia is prepared to submit invoice summaries and classifications to myDATA and to keep the Greek MARK identifiers with the documents.

Related terms

E-invoice (electronic invoice)An invoice issued, sent and received in a structured electronic format that software can process automatically. A PDF is not an e-invoice under EU law.Digital bookkeepingKeeping accounting records in software rather than on paper, increasingly required by law together with digital submission to the tax authority.PeppolAn open network for exchanging e-invoices and other business documents between registered participants through certified access points.Tax returnThe periodic declaration a business files with the tax authority to report its tax base and the tax due. VAT returns are monthly or quarterly; income tax returns are annual.

This entry is general information, not tax advice. Rules change; check the current position with your adviser or the tax authority of your country.

Back to the full glossary

Kontevia applies these rules for you

Rates, thresholds and e-invoicing formats come from the jurisdiction data of your country. You send the document, Kontevia books it and keeps the VAT summary ready.

Start in early access