Comments function in custom display for listings not working

Hi

Using the directory theme (Sep 2016 child) and i want to use the default listing view from the directory theme. I enabled the custom display under the listing page setup and got the ‘Codes from the Default Layout’ however the comments tab is not displaying the comments form. Not sure how to get this working in the shortcodes as im a bit of a rookie when it comes to customisation, can someone please help? The default code for the tab section of the page is below:

<ul class=”nav nav-tabs” id=”Tabs”>

<li class=”active”>{Description}