Checkout, custom plans, and the company profile now collect tax IDs. Buyers can enter a VAT number or other tax identifier during checkout; operators can add one on the company profile or during custom plan finalization. IDs are validated through Stripe's tax ID validation and written to the Stripe customer, so they render on invoices automatically — as Partita IVA, EU VAT, EIN, or any other Stripe-supported format.

No more collecting VAT numbers over email and pasting them into Stripe after the invoice already went out.