Egyptian Business Central customers are legally required to clear sales documents through the Egyptian Tax Authority (ETA) e-invoicing and e-receipt platforms — but BC core has no native ETA connector. This is a build-to-order extension: ECOSIRE builds it in AL against your chart of accounts, your item catalogue and your document flows, then installs it as a per-tenant extension on your Business Central environment (cloud SaaS or on-prem) and supports it after go-live.

The extension hooks into the posting pipeline with event subscribers on Sales Invoice, Sales Cr. Memo and POS receipt posting. On post (or via a Job Queue entry for batch submission), it builds the ETA-compliant JSON document, generates the document UUID, applies the digital signature (CADES/HSM or USB token per your accredited certificate), and submits to the ETA portal over its REST API. It then polls submission status — Valid, Invalid, Submitted, Rejected — and writes the returned ETA UUID, long ID and clearance timestamp back onto the BC document via table and page extensions, so finance staff see live clearance state inside the documents they already work in.

Tax-code and item-code mapping is handled with setup tables that map your BC VAT posting groups to ETA tax types/subtypes and your items to EGS or GS1 codes, with validation before submission to avoid rejections. Credit and debit notes carry the original document reference required by ETA. A dedicated permission set, an ETA submission log, and a retry/resubmit action round out operations.

No instant AppSource download — this is a scoped engagement with a defined lead time, UAT on your data, and a support agreement after handover.