There are a few ways you can turn off comments in WordPress.
Turn all comments off/on
To turn all comments off or on in WordPress, in the left hand Dashboard menu inside your WordPress site, go to Settings ->
You’ll want to either turn that on or off.
Remove comments from a post
To remove comments from just posts on your website, go to appearance -> editor , where you’ll need to edit the single.php file, removing:
<?php comments_template(); ?>
This should be found just above the footer include.
Removing comments from page
Almost exactly the same as removing from a post, except you edit the page.php file, removing the same line.
Hope this helps!