<?php

use SJRoyd\MF\VATStatus\VAT;

include '../vendor/autoload.php';

$status = (new VAT)->checkByNip('4658741012');

echo 'Code: '.$status->getCode().PHP_EOL;
echo 'Message: '.$status->getMessage().PHP_EOL;
echo 'Error: '.($status->isError() ? 'true' : 'false');

The meaning of codes:

N - The entity with the provided tax ID NIP is not registered as a VAT taxpayer
C - The entity with the tax ID provided is registered as an active VAT taxpayer
Z - The entity with the provided tax ID number is registered as an exempt VAT taxpayer
I - Inquiry error - Invalid Tax Identification Number
D - Query error - Date outside of the specified range
X - Service inactive