Keep your books in
QuickBooks Online — posted for you.
Your store posts customers, invoices, payments and credit memos straight to QuickBooks Online as they happen, then reconciles by signed webhook so both sides stay accurate. A native, OAuth-connected sync with an auditable log on every operation — not Zapier glue between your store and your ledger.
The records your accountant actually opens.
Not a vague "orders feed". The integration posts the specific accounting records your QuickBooks Online file is built around, so your ledger reflects the store without a monthly export-and-rekey ritual.
Reconciled by signed webhook.
Posting one way isn't enough — books drift the moment something changes upstream. QuickBooks Online sends HMAC-signed change events that CARTT verifies and applies, so the two systems agree. Every operation lands in an auditable sync log, so reconciling what went where is a lookup, not a guessing game.
- HMAC-signed webhooks verified before anything is applied
- Change events keep your store and your ledger aligned
- An auditable sync log records every operation, with its outcome
- Failed pushes retry rather than disappearing silently
The same engine as every other connection.
QuickBooks Online isn't a one-off bolt-on. It runs on the same connector engine — retry queue, field mapping and audit log — that powers CARTT's other native integrations. You connect through OAuth, per portal, and each merchant connects their own QuickBooks Online account.
- OAuth-connected, configured per portal from the admin
- Shared retry queue picks failed pushes back up
- One field map keeps customers and accounts aligned
- Each merchant connects their own QuickBooks Online account
Prefer to keep your books inside the platform?
If you'd rather not run a separate accounting product at all, CARTT has its own built-in accounting. Your books live in the same platform as your store, sharing one set of customers, invoices and payments — no connection to maintain. Sync to QuickBooks Online if your accountant works there; use CARTT's own ledger if you'd rather not.
Where this fits in the platform.
The accounting sync is one connection among many. Here's the rest of the picture, and where to look next.
Let your store keep your QuickBooks Online file current.
Connect your own account, and customers, invoices, payments and credit memos post across automatically — reconciled by signed webhook, recorded in an auditable log. We'll walk you through it with your store.