The developer API v1.1 has been updated to include information regarding the myDATA submission status.
mydata_submission_status informs you whether the invoice has been submitted to myDATA or not,
displays the invoice’s unique identifier and
mydata_latest_mark returns the latest MARK number
(submission ID). All fields are included in the response body of the invoice, credit note & payments received endpoints.
This update only applies to the greek version of the application.