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Greece myDATA Solution

Updated: Feb 6

1. Introduction


The transposition of Directive 2014/55/EU into Greek law as Law №4601/2019 was adopted in the first quarter of 2019. The transposition was made in line with the text and scope of the Directive.


Authorized institutions for eInvoice and eBooks in Greece are the Ministry of Finance and AADE. For that reason, technical and legal developments and processes in e-Invoice and e-Books in Greece are managed by the Ministry of Finance and AADE.


Greek authorities adopted the Peppol CIUS format, which is fully compatible with the European standard for B2G invoicing. Within the scope of B2G, the four-sided model of the Peppol eDelivery network has been adopted, as well as an interoperability architecture.


2. MyDATA Application


myDATA (My Digital Accounting and Tax Application) is the name of the new electronic platform by the Greek public administration AADE, through which electronic books are introduced into the daily lives of businesses.


The main aim of the myDATA system:


  • Monitor the ensemble of input/output transactions of businesses and other entities keeping Accounting Records pursuant to the Greek Accounting Standards (GAS)

  • Display the accounting and tax results of businesses, as per the information contained in the Electronic Books


The IAPR/AADE myDATA platform comprises two Books:


  • The Detailed Book, for entering a Summary of the Business input/output Accounting Source Documents; classifying transactions; and making all accounting entries necessary to assess the accounting and tax results of each year

  • The Summary Book, which displays aggregate Business results on a monthly and yearly basis.


eBooks made available by the myDATA system are used for:

  1. Enter and forward a Summary of Job input/output Accounting Source Documents

  2. Categorize entered transactions

  3. Make the necessary Accounting Entries to evaluate the accounting and tax results for each year

The above entries have been standardized by AADE to allow businesses to transmit their data electronically. These are called Accounting Source Document Data Standardizations.

Accounting Source Document Data Standardisations accepted by Greek authorities are as follows:

  • Sales Invoice

  • Service Rendered Invoice

  • Proof of Expenditure

  • Credit Invoice

  • Invoice for Self-delivery and Self-supply

  • Transport Documents

  • Service Rendered Receipt

  • Retail Sales Receipt/Credit Note

  • Contract (either income or expense)

  • Special Document (collection/payment receipt)

  • Payroll

  • Amortisations

  • Other input/output adjustment/regularisation entries


Four different ways are provided to submit the Accounting Source Document Data to the IAPR:

  1. Business Accounting/Commercial Software: The Summary of Accounting Documents will be collectively transmitted to myDATA through the interoperability of software systems currently used by businesses (commercial, accounting, ERP).

  2. Special Data Entry Form: For small enterprises that issue a small number of account documents and do not use software systems. The Greek authorities have expanded the Special Data Entry Form to also function as the Accounting Source Document Digitization Application. In practice, when the Summary is entered via the Custom Form, the Business can also: a free text field is used to fill in all the detailed information about goods and services Receive the Accounting Resource Document in digital format (eg .pdf); delivered to the addressees via e-mail or in print

  3. eTax Register Machines: The Businesses uses for retail sale transactions.

  4. Electronic Invoicing: Electronic Invoices shall be automatically transferred to the myDATA application by the eInvoicing providers.

Phase one: The entity transmits the Summary of all Accounting Source Documents (wholesale, retail, B2B or B2C in Greece or abroad) that it has issued. After the Issuer Transfer, Buyer’s eBooks (according to GAS) are automatically updated.


Phase two: The entity transmits a Summary of all Accounting Source Documents it receives when:


Summary of documents for purchasing goods, expenditures and services from Issuers (e.g. individuals, foreign businesses) who are required to observe retail documents issuing GAS and who do not need to observe GAS, and documents for purchasing Goods/Services from issuers required to observe GAS Summary of the Issuer’s Accounting Source Document transfers if the company neglects to transfer within the relevant deadline.


In the final phase, each Business will transfer Transaction Classifications and its own Correction/Adjustment Accounting Records.


Upon transfer of the Accounting Source Document Summary by the Issuer, the following are automatically updated:

  1. Their Revenues in their Electronic Books

  2. Expenses in Electronic Books of the relevant domestic Buyer

Upon transfer of the Accounting Source Document Summary by the Buyer, the Expenses in their own Electronic Books are automatically updated.


2.1. Book Types in myDATA Application


It contains a summary of the following information, after the Detailed Book has been updated at the level of monthly income/expenses :

It is shown that a Summary Display Book from myDATA application.


2.2. Consistency between Returns and eBooks: First Cross-Reference


Through myDATA, all Business Tax Return data is cross-referenced with data from Electronic Books.

Initial Cross-Referencing occurs the day after the deadline for each return has expired.

  • Consistency

  • Inconsistency in Principle

In case of Inconsistency in Principle, IAPR sends relevant automated messages to Businesses so they can take all necessary corrective actions (eg transfer of Recipient Accounting Source Document, return change etc.) within two months(60-day Harmonisation).


3. Melasoft Solution for Greece


Melasoft myDATA SAP Solution for Greece is provided automatic and real-time reporting of all e-Documents issued in SAP, import of invoice data from myDATA to SAP system and ability to export unique invoice numbers (MARKs) to expense documents.


In addition, Melasoft Solution includes:

  1. Sending all income and expense documents

  2. Transmission of all accounting reconciliation documents for tax and financial results

  3. Digital tax reporting in a Melasoft SAP Add-on

First of all, it starts with the necessary data acquisition.


Secondly, this received data then needs to be mapped and processed to prepare it in the format requested by the IAPR.


Finally, these converted data will be sent to the myDATA Greece portal. Melasoft add-on solution for Greece includes all three of these key components in a single SAP add-on solution.

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