Microsoft Dynamics 365 Business Central has no built-in, country-aware withholding tax engine outside a handful of localizations, so most tax teams manage WHT in spreadsheets and post manual journals — error-prone and audit-unfriendly. This extension fixes that.

What it is. A custom AL extension built to your exact WHT rules, installed as a per-tenant extension on your Business Central environment (cloud SaaS or on-prem), not a generic AppSource download. ECOSIRE scopes the countries, rates, thresholds and certificate formats you need, builds the extension, deploys it through your admin center / Extension Management, and supports it.

How it works in BC. Table and page extensions add WHT setup to Vendor, Purchase, and Payment Journal pages. Event subscribers on document posting (e.g. OnAfterPostPurchaseDoc, payment application events) auto-calculate the withholding amount, post it to a dedicated G/L account, and write a WHT ledger entry — no manual journals. A configurable rate table keys WHT by country, vendor, nature-of-payment code and threshold, with vendor exemption certificates honored automatically.

Certificates and returns. Generate WHT certificates per vendor/period as Word/RDLC report layouts you can brand, plus period-end statutory return datasets exportable to Excel/CSV for filing. Data is exposed via the BC REST/OData API for Power BI dashboards and Power Automate flows, and a Job Queue entry can prepare period returns on a schedule.

Honest delivery. This is build-to-order. After purchase ECOSIRE confirms requirements, builds against your localization, installs on a sandbox for UAT, then promotes to production with a permission set and handover docs.