This system wide Sales Default setting in weintegrate controls what information from your Shopify sale appears in the ‘Reference no.’ field on your sales receipt within QBO.
You can choose between defaulting either your ‘Sales Channel Order #’ from your Shopify Store or ‘Transaction ID’ that Shopify sets on behalf of an order.
The Sales Default screen is available in both the Configuration Setup Wizard and the Connection management section of the app.
Click here to learn about setting the Track locations default for integrating with QuickBooks Online.