Turns OpenCart 4 orders into UBL-TR 1.2 compliant e-Fatura and e-Arşiv Fatura documents. Generates the full Invoice structure: UBLVersionID 2.1, CustomizationID TR1.2, ProfileID (TICARIFATURA / TEMELFATURA / EARSIVFATURA), ETTN (UUID v4), InvoiceTypeCode, supplier and customer AccountingParty blocks with VKN/TCKN PartyIdentification and Vergi Dairesi, KDV breakdown per rate with TaxTypeCode 0015, invoice lines with unit codes and per-line allowances, and LegalMonetaryTotal in TRY. Invoice numbers follow the GİB format (3 character serial + year + 9 digit sequence) and are allocated once per order, so re-downloading never changes the number or the ETTN. Includes a per-order download panel, a date range batch export that produces a ZIP with a validation report, and a validate action that checks the document without consuming an invoice number. Every document is re-parsed with DOMDocument before it is handed out. Admin panel ships in Turkish and English. Note: documents are NOT digitally signed - the mali mühür / e-imza is applied in the GİB portal or by your integrator.