To configure the fields in your reports, you must go to Preferences > Report Configuration and there you will see all the reports available. Please bear in mind that the Needs Report Data configuration will only be available if the option Report with one line header is selected. If one-line header is not active, the reports will contain all the existing fields without the opportunity to configure. The configurations that you define in the Preferences will be the default values for new tasks. To configure the reports in each task individually, you must use the tab Reports inside the task or when you create or edit a task, in the tab General, look for the options Report Data. In all 3 cases (either in Preferences, in the tab Reports inside the task or in the General tab when you create or edit a task) you will have two columns – simply drag and drop from the left to the right column to select the data that will be included in your report and their order in the resulting file.