Once your subscription has been created, you will be able to retrieve all your payments history directly in your User settings (in top left of the interface near your name / avatar) > tab Plan > History.
You will be able to download the receipt as PDF and the invoice.
If you want to receive a receipt in your email on each renewal payment, be sure to enable the setting in your User settings tab Notifications.
Be aware as Soundiiz is reserved to non professional usage, the invoice can't be personalized with your company name or VAT number for example after payment.