By default, we will map transactions to the Default Other Income and Default Other Fee accounts specified on this tab. Using the Setup Wizard, these are the Amazon Other Income and Amazon Other Expense accounts.
You can map a specific transaction to your own account from the dropdown menus.
If you've just created the account in QuickBooks Online, click on the refresh button so that the account will show up.
Once you click on "Assign," you'll see the mapped accounts in the field below. You can remove them if you've made a mistake or want to change accounts.