WooCommerce – Tax Exempt

gistfile1.php

/**
 * Add tax exempt fields to checkout
 **/
 
add_action('woocommerce_before_order_notes', 'taxexempt_before_order_notes');
function taxexempt_before_order_notes( $checkout ) {

    woocommerce_form_field( 'tax_exempt_checkbox', array(
        'type'          => 'checkbox',
        'class'         => array('tiri taxexempt'),array( 'form-row-wide', 'address-field' ),
        'label'         => __('Tax Exempt?'),
        ), $checkout->get_value( 'tax_exempt_checkbox' ));

    woocommerce_form_field( 'tax_exempt_name', array(
        'type'          => 'text',
        'class'         => array('form-row-first', 'tiri', 'taxexempt', 'textbox', 'hidden'),
        'label'         => __('Tax Exempt Name'),
        ), $checkout->get_value( 'tax_exempt_name' ));

    woocommerce_form_field( 'tax_exempt_id', array(
        'type'          => 'text',
        'class'         => array('form-row-last', 'tiri', 'taxexempt', 'textbox', 'hidden', 'update_totals_on_change'),
        'label'         => __('Tax Exempt Id'),
        ), $checkout->get_value( 'tax_exempt_id' ));
}

/**
 * Remove taxes from order if user is tax exempt
 **/

add_action( 'woocommerce_checkout_update_order_review', 'taxexempt_checkout_update_order_review');
function taxexempt_checkout_update_order_review( $post_data ) {
    global $woocommerce;

    $woocommerce->customer->set_is_vat_exempt(FALSE);

    parse_str($post_data);

    if ( isset($tax_exempt_checkbox) && isset($tax_exempt_id) && $tax_exempt_checkbox == '1' && !empty($tax_exempt_id))
        $woocommerce->customer->set_is_vat_exempt(true);                
}

/**
 * Update the order meta with 'Tax Exempt Name' and 'Tax Exempt ID'
 **/
 
add_action('woocommerce_checkout_update_order_meta', 'taxexempt_checkout_update_order_meta');

function taxexempt_checkout_update_order_meta( $order_id ) {
    if ($_POST['tax_exempt_name']) update_post_meta( $order_id, 'tax_exempt_name', esc_attr($_POST['tax_exempt_name']));
    if ($_POST['tax_exempt_id']) update_post_meta( $order_id, 'tax_exempt_id', esc_attr($_POST['tax_exempt_id']));
}

/**
 * Display 'Tax Exempt Name' and 'Tax Exempt ID' on the order page
 **/
 
add_action( 'woocommerce_admin_order_data_after_billing_address', 'taxexempt_display_admin_order_meta', 10, 1 );
 
function taxexempt_display_admin_order_meta($order){
    echo '<p><strong>'.__('Tax Exempt Name').':</strong> ' . $order->order_custom_fields['tax_exempt_name'][0] . '</p>';
    echo '<p><strong>'.__('Tax Exempt ID').':</strong> ' . $order->order_custom_fields['tax_exempt_id'][0] . '</p>';
}