/* Back Button */
    $form['actions']['previous'] = array(
        '#type' => 'link',
        '#title' => 'Previous',
        '#url' => Url::fromRoute('CompanyForm'),
    );

    /* Validate and Submit Form */
    $form['actions']['submit'] = array(
        '#type' => 'submit',
        '#value' => 'Submit',
    );