Simple filter to change the 'no_shipping' value from 1 to 2 with PayPal Standard in WooCommerce when no shipping is needed.

functions.php

<?php // do not copy this line

/**
 * Simple filter to change the 'no_shipping' value from 1 to 2 with 
 * PayPal Standard in WooCommerce when no shipping is needed.
 * 
 * @param  arr $data The original data.
 * @return arr       The updated data.
 * @link   https://wordpress.org/support/topic/shipping-and-or-billing-address-not-being-sent-to-paypal-2/
 * @link   https://gist.github.com/jessepearson/3c258df272e73db875e901c0909a3554
 */
function jp_set_paypal_no_shipping_to_two( $data ) {

	if ( isset( $data['no_shipping'] ) && 1 == $data['no_shipping'] ) {
		$data['no_shipping'] = 2;
	}
	return $data;
}
add_filter( 'woocommerce_paypal_args', 'jp_set_paypal_no_shipping_to_two', 10 );