If you need to download copies of your tax invoices for your Cliniko subscription, you can do so by heading to Settings, and then Cliniko subscription:
Scroll down a bit to where it says Your invoices:
Each tax invoice will be accessible via a link that says "Subscription". Select the one for the date in question, and it will open up a PDF in a new window (or download one directly to your computer, depending on what your settings are). The tax invoice will look something like this:
If you need to update the card you use for payment, you can also do that within your subscription settings.