You must be able to substantiate your claims for deductions with written evidence if the total amount of deductions you are claiming is greater than $300. The records you keep must prove the total amount, not just the amount over $300.

ATO now requires items claimed under this category to be itemised.  Therefore, please provide a detailed breakdown of deductions you may want to claim.

If work related portion of tools and equipment and professional libraries each costs $300 or less, you will be able to claim an immediate deduction for these. Otherwise they will need to be depreciated over their effective life.