If you send raw materials, semi-finished goods, or capital goods to outside processors under India's GST job-work provisions, Odoo out of the box has no idea what a delivery challan under Rule 45 is, cannot track the 180-day (or 3-year for capital goods) return window, and produces nothing you can hand to your accountant for ITC-04. Teams end up bridging that gap with spreadsheets, manual challan Word templates, and quarter-end panic reconciliations — with real Input Tax Credit at risk if goods aren't returned or accounted for in time.

This is a BUILD-TO-ORDER Odoo module. ECOSIRE designs, builds, installs, and supports it on your Odoo 17, 18, or 19 instance (Community or Enterprise) — it is not a one-click download from apps.odoo.com. After you order, our Odoo engineers scope your exact job-work flows (single-stage vs. multi-stage sub-contracting, principal-to-job-worker and job-worker-to-job-worker movements, capital goods), then deliver a tested, documented module in a typical 2–4 week window.

Under the hood it is native Odoo, not a bolt-on. We add a job-work challan model (a proper models.Model with fields, sequences, and @api.depends computed balances) that references your stock.picking, stock.move, and product records so every dispatch and every return is a real inventory movement — no shadow spreadsheet. A QWeb PDF report renders a compliant delivery challan (challan number, date, HSN, quantity, taxable value, nature of processing, transporter details) you can print or email straight from the challan form. Computed fields keep a live "sent vs. received vs. balance" position per challan and per job-worker, and Odoo automated actions (ir.cron + base.automation) watch the return clock and raise activities/alerts as the 180-day deadline approaches so ITC is never silently lost.

At quarter-end, the module aggregates the challan and return data your Chartered Accountant needs to file ITC-04 — goods sent to job-workers, goods received back, and goods sent onward from one job-worker to another — exportable so your CA isn't rebuilding it by hand. Access is controlled the Odoo way via ir.model.access.csv and record rules, so job-work clerks, plant managers, and accountants each see only what they should, and an optional portal (controllers + QWeb templates) lets each job-worker log in to view their open challans, confirm receipts, and update processing status. Where you already have upstream or downstream systems, the standard Odoo XML-RPC/JSON-RPC API surface stays available so challans and balances can be read or created programmatically.

You get GST job-work discipline enforced inside the ERP you already run — accurate challans, an auditable material trail, deadline alerts that protect your credit, and ITC-04-ready data — built, installed, and backed by ECOSIRE.