To correct a non-transmitted document, I go to Purchases / Sales🔴 and check if my document has been transmitted by following the instructions HERE.
After verifying that it hasn’t been transmitted, I open my document and click the three dots at the top right. I select “Edit” -> “Lock document editing/deletion”.
Once I make the necessary corrections, I click Save💾 and then Reprint to send it to the tax authority (ΑΑΔΕ) if it is a document type that requires transmission.
