Force Billing Address

/**

 * Always force the billing address to show at checkout.

 */

function prefix_edd_force_billing_address() {

	// If the cart already needs tax address fields, don't force the billing address.

	if ( edd_cart_needs_tax_address_fields() ) {

		return;

	}

	if ( ! did_action( 'edd_after_cc_fields', 'edd_default_cc_address_fields' ) ) {

		edd_default_cc_address_fields();

	}

}

add_action( 'edd_purchase_form_after_cc_form', 'prefix_edd_force_billing_address' );