The answer to my original question was that I should increase my allowances on my W4. Being single though I can either claim 0 or 1 allowance. So I'll have to see if that 1 allowance will adjust my taxes according to better hit my estimated payments.

@Hodgman
https://www.ato.gov.au/Business/Income-and-deductions-for-business/Claiming-tax-losses/Offsetting-current-year-losses-against-other-income/

Looks like it does exist, but that it is harder to qualify for.