Account, then Billing, shows the plan you are on, how many customers you are using, and a badge saying where the subscription stands: active, cancelling at the end of the period, past due, and so on.
Everything else is Stripe
Payments, VAT, invoices and your card details are handled by Stripe rather than by us, which means we never see or store a card number. On Pro you get a Manage subscription with Stripe button that opens their billing portal, and from there you can change the card you pay with, read your invoices and cancel.
If a payment has failed
The badge says the payment is past due, and the account keeps working for seven days before anything closes; we email you the date, and Stripe will retry the card in the meantime. Updating the card in the Stripe portal is the whole fix, and everything comes back the moment the payment lands.
Only an Administrator can open Billing. A Team Member does not see the tab at all.