Depending on your subscription plan you will receive an invoice either monthly or annually. The invoice will be received via email from Stripe and will provide you with all necessary information regarding the transaction and other information for accounting purposes.
Tax in the form of GST is included in the amount paid. GST is 1/11th of the invoice total. Here is a link to the Australian governments requirements for tax invoices: https://business.gov.au/finance/payments-and-invoicing/how-to-invoice