This setting under Feature Setting, ensure that you map all Amazon Sales Orders to a Single Customer in QuickBooks Online.





If you choose Yes, the orders placed by your customers in Amazon would be imported to just one customer in QuickBooks Online (Amazon Sales would be the customer name). 


If you choose No, all the sales orders will be linked to the corresponding customer as in Amazon.


Note: If you enable this setting, your customers will not be created in QuickBooks Online.