Where can I find my invoices?
Invoices will be emailed to the email address you used to sign up for your account or the email address you added to the account under "invoicing".
The invoices will also be available from your account under the menu point 'My account' (on the top right corner) and the blue 'Invoices' button at the top of the account page.
Please note that if you are on a free subscription or a free 1-month trial, you will not see the blue 'Invoices' button.
Why does it say 'No invoices have been issued for you'?
If you have signed up for a premium subscription (by adding your payment information) and you see the message 'No invoices have been issued for you' under 'Invoices', this is because the first invoice has not yet been issued.
Subscriptions are billed monthly in arrears (unless you choose to pay yearly in advance) and it will therefore take 1 month from the time you sign up to a premium subscription and until the first payment is made and you receive the first invoice.
See also Can you send the invoices to a different email? for instructions on how to change the email recipient of the invoices.