Https url VIES not working

The URL in the documentation just contains a typo. If you can point me to where you see that URL, I will ask to fix it.
The URL used to validate VAT numbers is different (it’s https://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl) and it works fine.

If the VAT is not deducted, I would suggest to look at the following FAQ: https://www.ads-software.com/support/topic/faq-vat-is-not-deducted-when-entering-a-valid-vat-number/. It covers the most common causes of that issue, and explains how to troubleshoot it.