Problems with comment box

Hi,
You need to rewrite in your Child theme file comments.php, then find there next code:

$args =  array(
    'comment_notes_after' => '<p class="form-allowed-tags">' . sprintf( __( 'You may use these <abbr title="HyperText Markup Language">HTML</abbr> tags and attributes: %s' ), ' <pre>' . allowed_tags() . '</pre>' ) . '</p>'
);

and replace it with:

$args =  array(
    'comment_notes_after' => ''
);