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The subscription price is net (tax_behavior=exclusive in Stripe), so the Checkout session now enables Stripe Tax and collects what the rate needs: - automatic_tax: 25% moms for SE customers, reverse charge for EU-B2B with a valid VAT number; it carries onto the subscription so renewals and the post-trial first charge stay taxed. - tax_id_collection + billing_address_collection: capture the VAT number and address so Stripe issues a compliant momsfaktura. - customer_update: persist name/address onto the pre-created customer. BillingActions now shows "199 kr/man exkl. moms" plus the inkl. price. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>