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Build e-Defter (XBRL-GL) Ledgers and Berat for GİB

Skill: Convert the general ledger into e-Defter XBRL-GL files plus GİB-approved berat

Region: Türkiye (Turkey) Category: Accounting — e-Defter (electronic books) Does: Takes the posted general ledger and produces the e-Defter electronic books — the yevmiye defteri (journal) and büyük defter (general ledger) — in the XBRL-GL (Global Ledger) XML format, each accompanied by its berat (certificate) file that is signed and approved (onay) by the GİB (Gelir İdaresi Başkanlığı). Standard: e-Defter — XBRL-GL (GİB e-Defter teknik kılavuzu)

e-Defter replaces the paper-bound, notarised journal and ledger. Each period (monthly, or quarterly for those who elect it) you generate two XBRL-GL documents (yevmiye + büyük defter), hash and sign each with the Mali Mühür / e-imza, then create the matching berat files. The berat are uploaded to the GİB e-Defter portal (or sent via özel entegratör) and returned with the GİB seal — the GİB-approved berat is the legally valid proof, not the ledger file alone. Upload deadlines run several months after the period; confirm the current calendar. Validate against the current e-Defter teknik kılavuzu before submission.


When this applies


Input data required

Input XBRL-GL element
Entity VKN/TCKN, title, period start/end gl-cor:entityPhysicalLocation*, gl-bus entity data
Journal entry id (fiş no) and date gl-cor:entryNumber, gl-cor:entryDate
Line: account code (hesap kodu), name gl-cor:accountMainID, gl-cor:accountMainDescription
Debit / credit amounts (borç / alacak) gl-cor:amount + gl-cor:debitCreditCode (D/C)
Document type and reference (belge türü / no) gl-cor:documentType, gl-cor:documentNumber
Posting/entry comment (açıklama) gl-cor:detailComment
Period totals (debit/credit control) document gl-bus summation

Account codes follow the Turkish uniform chart of accounts (Tek Düzen Hesap Planı). The berat references the ledger file's hash and the period.


Document structure (XBRL-GL + berat)

e-Defter package (per book, per period)
├── Yevmiye Defteri  (xbrli:xbrl, XBRL-GL)
│   └── gl-cor:accountingEntries
│       └── gl-cor:entryHeader (entryNumber, entryDate, entryComment)
│           └── gl-cor:entryDetail (account, amount, debitCreditCode, document...)
├── Büyük Defter  (xbrli:xbrl, XBRL-GL — same entries grouped by account)
├── Yevmiye Beratı (edefter:berat — period, file hash, signature)
└── Büyük Defter Beratı (edefter:berat)

Each book file is signed (Mali Mühür / e-imza); the berat wraps the book's parça (part) hash and identifiers and is what GİB seals on approval. Amounts are in TRY with the kuruş precision required by the kılavuz.


Calculation rules


Worked example (yevmiye entry, XBRL-GL outline)

<?xml version="1.0" encoding="UTF-8"?>
<xbrli:xbrl xmlns:xbrli="http://www.xbrl.org/2003/instance"
  xmlns:gl-cor="http://www.xbrl.org/int/gl/cor/2006-10-25"
  xmlns:gl-bus="http://www.xbrl.org/int/gl/bus/2006-10-25">
  <gl-cor:accountingEntries>
    <gl-cor:documentInfo>
      <gl-cor:entriesType>journal</gl-cor:entriesType>
      <gl-cor:periodCoveredStart>2026-05-01</gl-cor:periodCoveredStart>
      <gl-cor:periodCoveredEnd>2026-05-31</gl-cor:periodCoveredEnd>
    </gl-cor:documentInfo>
    <gl-cor:entityInformation>
      <gl-cor:organizationIdentifiers>
        <gl-cor:organizationIdentifier>1234567890</gl-cor:organizationIdentifier>
        <gl-cor:organizationDescription>Örnek Teknoloji A.Ş.</gl-cor:organizationDescription>
      </gl-cor:organizationIdentifiers>
    </gl-cor:entityInformation>
    <gl-cor:entryHeader>
      <gl-cor:entryNumber>2026000512</gl-cor:entryNumber>
      <gl-cor:enteredDate>2026-05-15</gl-cor:enteredDate>
      <gl-cor:entryComment>Satış faturası ABC2026000000123</gl-cor:entryComment>
      <gl-cor:entryDetail>
        <gl-cor:account>
          <gl-cor:accountMainID>120.01</gl-cor:accountMainID>
          <gl-cor:accountMainDescription>Alıcılar</gl-cor:accountMainDescription>
        </gl-cor:account>
        <gl-cor:amount>12000.00</gl-cor:amount>
        <gl-cor:debitCreditCode>D</gl-cor:debitCreditCode>
        <gl-cor:documentType>fatura</gl-cor:documentType>
        <gl-cor:documentNumber>ABC2026000000123</gl-cor:documentNumber>
      </gl-cor:entryDetail>
      <gl-cor:entryDetail>
        <gl-cor:account>
          <gl-cor:accountMainID>600.01</gl-cor:accountMainID>
          <gl-cor:accountMainDescription>Yurtiçi Satışlar</gl-cor:accountMainDescription>
        </gl-cor:account>
        <gl-cor:amount>10000.00</gl-cor:amount>
        <gl-cor:debitCreditCode>C</gl-cor:debitCreditCode>
      </gl-cor:entryDetail>
      <gl-cor:entryDetail>
        <gl-cor:account>
          <gl-cor:accountMainID>391.01</gl-cor:accountMainID>
          <gl-cor:accountMainDescription>Hesaplanan KDV %20</gl-cor:accountMainDescription>
        </gl-cor:account>
        <gl-cor:amount>2000.00</gl-cor:amount>
        <gl-cor:debitCreditCode>C</gl-cor:debitCreditCode>
      </gl-cor:entryDetail>
    </gl-cor:entryHeader>
  </gl-cor:accountingEntries>
</xbrli:xbrl>

Entry balances: borç 12000.00 = alacak (10000.00 + 2000.00). Sign each book, build the berat, upload to GİB, and retain the GİB-onaylı berat.


Validation checklist


Last updated: 2026-06-04 — confirm the active schema version, field codes, and GİB requirements against the current Gelir İdaresi Başkanlığı (Revenue Administration) specifications before use.