I got the following email from Westpac:
Now paying your taxes can be rewarding. You'll receive 20,000 bonus Altitude Points by making a payment to the Australian Taxation Office of $500 or more using your Altitude Black American Express card ending in ____. Bonus points apply only once per card account. Also, a card payment fee applies to ATO payments – for details of these fees, please visit ato.gov.au
Don’t miss out on your chance to turn tax time into rewards time.
Simply make your payment by 31 October 2015 to receive your bonus points.