The Withholding Tax Engine computes and books TDS, TCS, and WHT deductions automatically on vendor bills and customer invoices based on configurable section rules, thresholds, and party categories. For finance teams in Pakistan, India, Bangladesh, and other withholding regimes who currently calculate deductions on spreadsheets next to their ERP. Planned capabilities include rule tables per tax section with rate slabs and exemption certificates, automatic journal postings to withholding payable accounts, period-wise remittance summaries, vendor-facing deduction certificates, lower-deduction certificate handling, and reports formatted for statutory filing preparation. This app is currently in development on the ECOSIRE build pipeline. It will ship first for Odoo 17, 18, and 19 simultaneously, with an ERPNext port following on the v15/v16 track — the same triple-version coverage as every live ECOSIRE app. One-time license, free updates within your major version. Register your interest on this page to be notified at launch and to help shape the first release.