When importing a sales order to Quick Books online The Order Exchange system always sends the Supplier Freight Company Code for the Ship Via filed of sales order.

This value sends to Ship Via can be overridden based on the retailer setting Freight Company Code. You can specify the value you need to send as a parameterize string and it will be sent to the Ship Via field when importing an order.

For example if you need the Ship Via field to have order Delivery Type, you can specify the Freight Company Code retailer setting as {DeliveryType}. This will send the order delivery type for sales order Ship Via field.