I. Connect your Magento module to the "Production" Quickbook
1) Change the "Environment" in your module configuration from the "Sandbox" to "Production"
2) Click the "Save Config" button
3) Click the "Connect" button and
4) Authorize and connect to your QuickBooks Online Account:
5) Click the "Save Config" again
II. Go through the all module setting pages and re-save them
III. Don't forget click the "Synchronize" button on the "Payment Methods" tab too before you save config.
IV. Sync all entities were already synced with Sandbox Quicksale
This step is required to avoid send entities with the data related to Sandbox instance.
You need to re-sync records in the order shown below:
- Customers
- Products
- Orders and Invoices