Paying 12 months interest in advance to maximise tax benefits

Hi all,

Just wondering if someone can have a look at my intentions and see if they make sense or if i'm making a big mistake.

I am thinking of paying 12 months interest in advance to maximise this financial years tax return.

I have two IPs both with IO loans.

I am starting an apprenticeship soon which means my income will be next to nothing (~$20k)
So next financial year I won't be paying much tax therefore most of my deductions will be wasted.

This financial year I have been earning a decent salary so I have paid a decent amount of tax.  My theory is that if I pay 12 months interest in advance in June, then I can claim it as a deduction for this financial year.  I should be able to get a tax refund for almost all the tax I have paid.

Also this will have the benefit of receiving rental income but not making loan repayments for the whole year, which will help my cash flow.

Does this make sense?  Please let me know if there are any flaws or oversights in this plan.

Thanks in advance