To view print and save your receipts, visit your Billing Page and scroll to the Payment History box.
You'll be able to view and print your receipts directly on there. There's also an option to add your company info and VAT number if needed.
iOS iTunes Subscription
If your Planoly subscription was made through an Apple In-App Subscription Subscription, all receipts and transactions are handled directly by Apple.
Click this link here: See your purchase history in the App Store or iTunes Store, to see this information.
If you subscribed to Planoly with a PayPal payment, the invoice is automatically to you by PayPal. You can also log into your PayPal account and download the invoice from there.