# Slovak Tax Data Document (TDD)
The TDD is the report eConnect submits to the Slovak tax authority as part of Continuous Transaction Controls (CTC). It is not a UBL document type: it uses its own sk-taxdata schema and reports a summary of the invoice, not the full document.
Uploading or downloading the TDD yourself is not required. eConnect submits it automatically once CTC is enabled, and its documentId is delivered via webhook as tddDocumentId. See Tax Data Document (TDD) for its role in the CTC flow.
eConnect uses:
Customization ID
urn:peppol:taxdata:sk-1
Profile ID
urn:peppol:taxreporting
# XML
Both access points submit their own TDD for the same invoice: C2 for the sender, C3 for the receiver. Only ReporterRole and ReportingParty differ.