No — this is build-to-order. ECOSIRE engineers the extension to your jurisdictions, products and rate-engine target, then installs it as a private per-tenant extension on your Business Central environment. There is no instant AppSource download. Typical delivery is roughly 3–6 weeks depending on the number of jurisdictions, whether you connect an external cloud rate engine, and the complexity of your taxability matrix. We deploy to a sandbox first, validate against your sample transactions, then promote to production.

The one-time build includes a defined post-launch support window covering bug fixes and a compatibility check against Business Central's monthly and major releases, since base-app changes can affect event subscribers and API pages. Rate-table maintenance, new jurisdictions, or new integrations after the window are handled under a separate support agreement. Because you receive the full AL source, you are never locked out of your own extension.

No. The engine augments rather than replaces native posting. Event subscribers resolve the correct treatment per line and write results back to standard VAT entries, so VAT statements, audit reports and the GL stay authoritative. Each determination is logged with jurisdiction, rate, source and timestamp for traceability.

Both are supported. It can integrate an O-Series-style cloud rate engine over the BC REST/OData API for live, maintained rates, and it keeps an in-engine fallback rate table. A job-queue retry path handles transient external-lookup failures so high-volume posting isn't blocked by a slow or unavailable rate service.

Yes. The build includes API pages and Dataverse-friendly exposure so per-line determination data can feed Power BI tax dashboards or Power Automate flows. Dedicated permission sets keep configuration, override and read-only review access separated for governance.