Requirement: Client need the report which includes only the primary info in an invoice and have to be in csv format
Solution: The list view is displayed when you go to the NetSuite tab that lists the record you want, and click the task link for that type of record. Here it is invoice list. You can customize this view by changing the fields that display on the list page.To customize a list view, click Customize View or Edit View. Note that the Edit View button only appears when the list view has already been customized.

We can add the required columns and save.