To change your QuickBooks Commerce-Amazon Settings, go to your My Apps> Amazon> Settings.
1. General Settings

Enable Importing and Updating of Amazon Orders
To enable order importing, sync of sales orders coming through from Amazon to QuickBooks Commerce.
Enable Price Updates
Checking this box will enable sync of price updates to your Amazon products.
Enable Shipment Detail sync
Enable this to sync tracking information on your order to Amazon.
Channel Name
Change your channel name, for your reference on QuickBooks Commerce.
Tax treatment
Select from Account default, tax inclusive or tax exclusive.
Default tax for orders
Select from your list of tax types created or use tax from Amazon.
2. Price List and Locations

Edit your Retail price list here, and which locations (all locations or single location) you wish to assign MFN and AFN orders to Warehouse.
Save your changes and the Amazon settings will be updated.