e-Transformation is the name of the mandatory programme run by Turkey's revenue administration to move commercial documents from paper to electronic form. Today almost every firm above a given revenue threshold is in scope.
01. Document Types
e-Invoice: an invoice between registered users. e-Archive Invoice: an invoice issued to an unregistered buyer. e-Waybill: the shipment document. e-Ledger: the electronic form of the journal and general ledger. Alongside these sit e-Producer Receipt, e-Self-Employment Receipt and e-Reconciliation.
02. e-Invoice versus e-Archive
This is the most confused topic. If the buyer is registered in the tax authority system it's an e-Invoice; if not, an e-Archive. The decision depends entirely on the buyer's status in the taxpayer list, and that list changes daily; your ERP must pull it regularly.
03. Mandate Thresholds
Scope widens every year and revenue thresholds are pulled down. As of 2026, amount-based exemptions on the e-Archive side have largely disappeared; e-commerce firms and intermediary service providers carry separate obligations. Check scope after every communiqué, not once a year.
04. How Documents Are Issued
There are three routes: the tax authority portal, direct integration and a private integrator. The great majority of firms use a private integrator, because it outsources the technical burden and the legislative tracking.
05. Retention Obligation
Electronic documents must be retained for ten years and be producible on demand. Even when the integrator provides archiving, the obligation stays with the taxpayer; write down how documents will be handed over to you when the contract ends.
06. Penalty Risk
Failing to issue a document, or issuing it incorrectly, carries a special irregularity penalty. The most common failure isn't technical but procedural: shipping goods and issuing the e-Waybill afterwards.