The Payroll item list is used by QuickBooks to track individual amounts on a pay, for example Hourly pay, Overtime etc. The payroll item list will only appear if your employee record has been selected to Use time data to create pay cheques, which means that you are paid based on the hours that you submit on a timesheet.
To set this option on, you need to edit the employee record in QuickBooks, then complete a Web Connector update to upload the change to Zed Office, once this has been completed then the Payroll item list will be active.
The Payroll items that appear on this list are those that have been set up against your employee payroll info tab in QuickBooks, to change what appear here you will need to edit that information on your employee record in QuickBooks and then run a Web Connector update.