insert-question.php

<?php
// Get question form object.
$form = anspress()->get_form( 'question' );

// Values.
$values = array(
  'post_title'   => 'Question title goes here',
  'post_content' => 'Question description goes here',
  'is_private'   => false, // True if not private.
  'category'     => 5, // Id of taxonomy term.
  'tags'         => array(
    23 => 'WordPress',
    25 => 'Joomla',
    27 => 'Website',
  ), // question_tag taxonomy term in id=>name format.
)

// Set values.
$form->set_values( $values );