Editing revenue categories Follow these steps to edit revenue categories: Navigate to Menu > Configuration > PMS Mappings > Revenue Categories. Select Edit to make these changes: Revenue Category: Specify the new revenue category. Profit Margin: Specify the new profit margin. Taxes and Fees: Specify the new rate. Start Date: Manually specify the date from which you want the taxes and fees applied. Alternatively, select a date from the calendar. Select Save.