DTE and electronic invoicing in El Salvador: what they are, how they work and why JSON matters

DTE stands for Documento Tributario Electrónico, or electronic tax document. In El Salvador, electronic invoicing turns tax documents such as final-consumer invoices, tax credit vouchers, notes and withholding vouchers into digital files with a technical structure.

For the end user, a DTE may appear as a PDF. For those preparing IVA books and systems such as AIBEX, the key file is the JSON because it contains structured fields that can be read, classified and transformed into IVA books.

Although DTE have a broader technical structure, certain fields appear repeatedly in accounting work: DTE type, generation code, control number, issue date, issuer, recipient, amount summary, IVA, withholdings and receipt seal.

Reliable automation is not about guessing from an image. It is about reading JSON, identifying the document type and validating whether it belongs in the selected book.

AIBEX uses DTE codes to direct each document to the right workflow. This classification prevents files from ending up in the wrong book and reduces corrections at month-end.

Previously, many books were built by copying fields from PDFs, Excel or downloaded reports. With DTE, preparation can become a review workflow: gather JSON, validate the business and month, review exceptions, export and document.

This does not remove tax responsibility. It does change how time is spent: less repetitive entry, more accounting review and better control of documents received or issued.