Welcome to TPG Community!
You must nominate an active payment method on your account either credit card or direct debit. Our system will automatically process the monthly renewal fee from your nominated payment method.
Just so you know, we debit your payment method one (1) week in advance to make sure your account does not expire.
You may view the invoices via My Account, but I'm afraid there's no readily-downloadable PDF for the tax invoices.
For reference on how to view your invoice: Access Individual Invoices
Let us know if there is anything else that we can assist you with.