Update your card, invoices or seats

Go to: Settings → My account → Manage billing. It opens Stripe's secure portal, where you can change your card, download invoices and see past payments. Seats update by themselves as people join or leave; there's nothing to change by hand.

Example: Priya's card expires. She taps Manage billing, adds the new card in Stripe's portal, and downloads last month's invoice for her accountant.