You can now put a licence number, an activity certificate or a personal identification code in a new Additional information field. Whatever you type there prints under your business details, worded exactly as you entered it.
Not every business has a company code. Someone trading as an individual in Lithuania invoices under an activity certificate number and activity codes, and an Icelandic sole trader under a personal identity code. Plenty of businesses also carry a licence number their invoices have to show. Until now the only place for those was Registration number, which takes one company code and nothing else.
Open Business settings and you will find the new field on the Company profile tab, under VAT & Registration. Your customers have the same field, so a number a customer asks you to include prints under their details instead. See Adding a licence, certificate or personal code to your invoices for the details.
A Finnish business now shows Y-tunnus on its invoices instead of the generic term, a Czech one IČO and a Danish one CVR-nr. The name follows the business the number belongs to, not the language of the invoice. So a Finnish company invoicing in English still shows Y-tunnus, which is the name its customer would search the register under.
Where a registry publishes the name in the reader's own language, that one is used instead: Y-tunnus is Business ID on an English invoice and FO-nummer on a Swedish one. Your customers' numbers follow the same rule, so one invoice can carry two different names, each correct for the business it sits under.