Where can I see my payment history and download invoices?

In the dashboard, look under Account → Billing History. It lists every payment record you've had — date, description, which plan, the amount and its status (Paid or Initiated) — and flags which ones have an invoice you can download. There's also a summary up top showing how many payments you've made, the total paid, and how many invoices are available. Handy at tax time, which I know is exactly when you'll remember you need it.