Finance teams that run their operations in Odoo but keep their books in QuickBooks Online end up doing the same work twice: an invoice raised in Odoo Sales gets re-keyed into the accounting platform, a vendor bill is entered in both systems, a customer payment is reconciled by hand, and the product/service list drifts apart until reporting no longer ties out. Odoo core has no native bridge to that external ledger — the closest built-in tool is the generic XML-RPC/JSON-RPC API, which gives you a transport but no mapping logic, no idempotency, no tax translation, and no reconciliation. Odoo Enterprise's own bank-sync and localization accounting modules are about Odoo's internal books, not a bidirectional feed to a separate cloud accounting product. That gap is exactly where duplicate data entry, month-end delays, and mismatched balances come from.

QuickBooks Online Connector PRO is the integration we build to close that gap. At its core is a custom Odoo module (__manifest__.py declaring account, sale, purchase dependencies) that adds a set of models — a connection/credential model, per-entity mapping tables (res.partner ↔ customers/vendors, product.product ↔ items, tax and account maps), and a sync-log model — plus the OAuth 2.0 client and REST layer that talks to the external accounting API. Records move on Odoo automated actions and scheduled ir.cron jobs: when an invoice is validated, a @api.depends-driven state check queues it for push; the connector maps the partner, lines, taxes, and income/expense accounts to their counterparts, sends it, and stores the returned external ID back on the Odoo record so the link is idempotent and a retry never creates a duplicate. Payments, credit notes, bills, and product/customer master data follow the same mapped, logged path, with a configurable direction (Odoo→external, external→Odoo, or two-way) per entity. Everything is visible: OWL/XML settings views for the mapping tables, a sync dashboard, per-record status, and QWeb-free log lines you can filter, with ir.model.access.csv and record rules so only accounting users touch the connection and its credentials.

Because this is made to order, we build it against your real configuration rather than a generic template. During scoping we capture your chart of accounts, tax codes, multi-currency needs, numbering rules, and which entities should sync in which direction, then we implement and test on a staging copy of your database. We support Odoo 17.0, 18.0, and 19.0 and adapt to Community or Enterprise (the accounting depth differs between the two, and we map to whichever you run). You receive the installable module source for your version, not a black box.

Delivery is build-to-order: after a short scoping call we confirm the exact entity list, field mappings, and sync directions, then build, test on staging with your data, run UAT, and deploy to production with a rollback plan — typically 2–4 weeks from confirmed scope. Pricing starts from $399 (indicative, single-company base scope); additional companies, extra synced entities, heavy historical data migration, or deeper localization/tax mapping increase the quoted scope. You get a firm fixed quote after the scoping call.