This set of pages provides detailed information on the qbXML messages sent to and received from, QuickBooks Desktop. Whether you are working with QBFC or qbXML, you will find a detailed list of values that can be included in each message, the datatype of each value, including enumerated values, whether it is required, and so on.
https://developer.intuit.com/app/developer/qbdesktop/docs/api-reference/qbdesktop
