Where do I find my invoices?
Go to Account, then Billing, and scroll to Invoices; click the download icon on any invoice to get the PDF.
Every payment for your plan and add-ons has an invoice.
Steps
Open Billing
Go to Account → Billing.
Find the invoice
Scroll to Invoices: each row shows the Invoice number, Date, Description, Amount and Status.
Download it
Click the download icon at the end of the row to open the PDF.
Questions
Which currency am I billed in?
Canadian websites are billed in Canadian dollars (CAD); websites everywhere else in US dollars (USD). Taxes are extra where they apply.