Technology Update
Our present is the best guarantee for the future

e-Tax Compliance in Greece – myDATA



The go live of Greece’s new e-Tax compliance system will finally occur in November 2021. As of that date companies must issue tax information electronically through the national myDATA platform.

The digitalization of the Greek tax system was approved in 2019 through Νόμος ν. 4646/2019. However, the health crisis caused by COVID-19 has delayed its implementation.

The Greek tax authority, The Independent Authority for Public Revenue (IAPR), understanding that many companies have faced difficulties adapting to the new tax reporting system has delayed implementation deadlines to give them more time.

Table of Contents

  • What is My Digital Accounting & Tax Application – myDATA?
  • What tax information must be reported through myDATA?
  • What companies must declare taxes through myDATA?
  • What is the compliance deadline?
  • What tax information must be sent through myDATA?
  • What is the compliance deadline?
  • How to issue e-books through myDATA
  • Who must declare tax data through myDATA and how often?


What is My Digital Accounting & Tax Application - myDATA

myDATA is a platform created by the IAPR to digitalize the tax and accounting declarations of companies through the issuance of electronic accounting books.

The IAPR is implementing myDATA because it wants to facilitate tax compliance for companies and achieve greater transparency in their transactions. This will help foment an environment of trust between the tax authority and private companies and will reduce tax fraud and evasion.

The implementation of myDATA is a major leap in the digital transformation of the Greek tax authority.


What Companies Must Declare Taxes Through MyDATA?

All companies that conduct accounting according to Greek accounting norms.


What Tax Information Must be Reported Through MyDATA?

Companies must report:

  • Summary of revenue and expense documents (synopsis)
  • Classification of revenue and expenses by type
  • Enough accounting entries to determine end of year accounting and tax results (for example, payroll, depreciation, revenue / expenses accumulated at year end)

Besides facilitating the declaration of accounting and tax information through myDATA, two electronic books will be generated and updated:

  • (Detailed Book): contains the revenue and expense document data, the classification of these documents, and the accounting entry adjustments,
  • (Summary Book):  Document that reflects a company’s tax and accounting results in an aggregate manner based on information provided in the detailed book.


What is the Compliance Deadline?

As of November 1st 2021 all companies must transmit accounting data required by the IAPR through myDATA.


How to Issue Information to the MyDATA Platform

Receiving information from the ERP, EDICOM’s Global Compliance solution transforms data into the format required by the IAPR and sends them to the myDATA platform. MyDATA then generates the accounting e-books and validates the information through a series of acknowledgements. EDICOM’s platform then integrates the acknowledgements into the company’s ERP, keeping you updated on the status of your communications with the myData platform. The whole process is instantaneous and transparent.

The government has established four ways to send information:

  • Through ERPs
  • Through e-invoice providers
  • Manually through the myDATA platform (only small companies)
  • Certified cash registers for retail sales transactions.


Who Must Declare Tax Data through myDATA and how often?

  • Revenue Documents (for example, account receivable invoices) must be reported and classified by issuers in real time.
  • Expense Documents (for example, accounts payable invoices) Generally they don’t have to be reported by the recipient since they have already been reported by the issuer. The recipient should classify this expense. However, if the issuer has not reported the revenue document (for example, and invoice issued by a foreign supplier, or if the issuer did not perform its legal obligation), the recipient must also report the expense before classifying it. The expense must be reported and classified before the end of the VAT declaration period (last day of the following month), except in cases where the issuer has not reported the document by omission (not because the issuer is exempt from the obligation). In this second case the issuer must report and classify this expense within the two months following the end of the VAT declaration period.
  • All companies must report the necessary accounting entries to determine the annual tax and accounting results (payroll, depreciation, etc.) accounting entries will be reported until the end of the sixth month after the end of the fiscal year.
  • Payroll will have to be reported during the withholding declaration period.

The digital tax declaration model will coexist with the current VAT declarations. The Greek tax authority IAPR will cross reference the myDATA e-books with VAT declarations. If there are any discrepancies taxpayers will have 2 months to correct any errors. Failing to correct any errors within the established period can trigger audits by the tax authority.

Would you like to find out more?

Ask for information.


Cloud Computing B2B Cloud Platform EDI ASP-SaaS e-Invoicing GDSN VMI VAN OFTP2 AS2 Certification Authority Digital Signature Outsourcing SLA Software EDICOM Events Expert Chat SaaS-ASP Corporate Information GS1 CFDI PAC APP Associated Facturae Data Sync NOM151 partners EDICOM Retail public administrations Acreditations Web Portal EDI NF-e einvoicing Partner Web Portal SAP EDI Health Edicomdata CRP EBI ei Payroll Portal B2B EDICOMNet edi logistics SAFT-PT Ticket Portal Avaluos business@mail EDI Manufacturers CT-e NFS-e TSD epayrolls factura electronica edi automotive customer support center comprobante de pago CAE e-billing DTE e-awb comprobantes fiscales electrónicos nfc-e eaccounting contabilidad electronica CFE comprobante fiscal electronico compliance eAWB retenciones electronicas xml-cargo peppol edicom air iata e-cargo IVA Cargo-XML EDICOMAir SUNAT Perú SEE Business Mail Payrolls recibos de sueldo EDI Auto b2g eprocurement datapool panama sii PCRDD SII AEAT NHS edi academy comercio exterior EDICOM LTA sat paperless mmog OFTP EDI Web colombia CFDI Nóminas DIAN México SAF-T VAT DESADV ASN Fatture B2B Costa Rica Complemento pagos Chorus Pro moda interoperabilidad Cancelación suministro inmediato de información european union digitalización emisión electrónica openpeppol global einvoicing factura electrónica ecuador automotive industry United States and Mexico edicom sii norway VAT compliance tax administration air freight sector UNCTAD aviso de expedición Advanced Shipped Notice Despatch Advice data synchronization peppol network peppol standards peppol european union chile tendencias interoperability interconexión SINTEL Brasil interoperabilidade foreign trade e-procurement trends digitization digital transformation SaaS edicomsii MMOG/LE latam global einvociing cybersecurity EDI financeiro white paper factura electrónica colombia fintech fashion eIDAS e-archiving ebimap SME EDICOMLta e-commerce EDI financiero russia fattura b2b B2B e-Invoicing GDPR RTIR FACe FACeB2B portugal blockchain ItalyNSO business@mailPharma vat compliance ar EDIHOSP EDICOMSignADoc

Follow us on

  • linkedin
  • rss