To access the invoices for your payments to Coacha, log into your account and click the settings cog in the black bar at the top of the screen (or head to Dashboard > Club Settings).
From here, click the 'Subscription Payments' tab and you'll see all invoices for your Coacha payments. The plan is called 'CoachaSubscription2017'.
You can then choose to either 'View' or 'Print' the invoice, whichever you require.
Please note, these invoices are just proof of your payments to Coacha which you can use for your accounts. They have already been paid to Coacha and therefore no further action is required.