Yes, just send your custom request via https://shop.proxmox.com/contact.phpCancellation of a Proxmox subscription
You can cancel your Proxmox subscription at any time. A billing cycle is one year from purchase...Payment methods - How can I buy?
You can pay by Bank transfer Credit Card PayPal Bank transfer (invoice):If you are...Renewal
If you purchased your subscription via the Proxmox online shop at https://shop.proxmox.com, we...VAT ID is not accepted
If your VAT ID is not accepted during the registration process, this might be due to a time out...Will I be charged VAT?
We are required to collect VAT charges from our customers based on the information you make...