This is big fat warning to all EU customers. JLPCB company policy is currently that they wont provide IOSS numbers to customers. So they collect "VAT" but customer needs to pay that VAT **again** to customs because no IOSS number provided. I dont know is real reason that they wont actually book keep that VAT and this make easier to collect it to own pocket or do they not just know how IOSS works.
They say that they will provide it to DHL but at least in Finland DHL will collect 20€ + 5% (what is more than vat) if they do customs work but you can do it by freee from customs page with few clicks. But for that customer need to know seller IOSS number.
So if you want use JLPCB order as company or prepare to paid your vat twice.