If you want to add a comment form on your main index page in WordPress, do the following:
- Open your theme’s index.php file. (e.g., /wp-content/themes/whatever/index.php)
- Find this line:
<?php endwhile; ?>
- Add these lines immediately above said line:
<?php $withcomments = 1; ?> <?php comments_template(); ?>
That’s all there is to it.