Code-Snippets-Functions/Execute a function on a child site/WooCommerce/set-customer-default-tax-location.txt

add_filter( 'woocommerce_get_tax_location', 'bbloomer_customer_default_tax_location', 9999, 3 );
 
function bbloomer_customer_default_tax_location( $location, $tax_class, $customer ) {
    if ( $customer && ! $customer->get_billing_country() ) {
        return array( 'US', '', '', '' );
    }
    return $location;
}