Choose whether to display the pretax subtotal, tax, and grand total in the travel summary pane. The travel summary pane is located in the top right corner of the booking engine. Below is an example of how the different options will appear. 

With:

Without: 

Instructions to Enable

Step 1: On the Extranet, under Booking Engine tab select on General Settings

Step 2: Select on Booking Engine Settings

Step 3: Under Display Room Tax Break Down, make your selection and be sure to Save when finished.