In the past, when I've needed to bring forward deductions into the current financial year, I've prepaid rates, the infrastructure portion of the urban utilities (water), and land tax. Land tax was not easy, but my perseverance paid off. I don't prepay land tax every year, but this year we have a LOT of tax to pay, so I thought I'd prepay it. Initial answer on the phone was "not sure" but the lady was very helpful, checked with a senior person and I was able to prepay as at today's date, using last year's reference number. This is something others might like to think about doing if they have a larger than usual tax bill coming up.