Jasa,
It sounds as if you could benefit from sound advice from a professional who understands property investments, what can be claimed and give an estimate on what your tax position will be now your income (presumably) will be lower in this financial year.
Depending on age of properties, building allowance may apply and certainly depreciation of fittings and fixtures should. These from a tax perspective can change a cash flow positive property to a negatively geared one for tax purposes. By all means get a quantity surveyor report for your properties and if applicable, you can put in amended assessments for the last 4 years.
From my perspective, it is generally preferable to have a investments returning a positive benefit than one that is running at a loss, tax is simply a consequence. We structure our affairs to minimise tax within the law but if we are earning a taxable income, we pay the tax accordingly. Tax should be regarded as a cost of running a successful business or investment portfolio.