There are many different types of income and expenditure in Amazon and Shopify. You can map each of these types to an account within QuickBooks or Xero the first time you use A2X. This mapping can be used again in subsequent months or you can change it at any time. When you first set up A2X, default mapping is provided which you can follow if you prefer.
If you have any questions reach out to the support team for more information.