If you were required to drive between two bases after having signed on then you might be able to claim the cost for that trip alone, but you may have to keep records
No records required if you travel less than 5000 klms per year, you do however need to be able to show how you arrived at the figure!
If you have nothing to claim, I would recommend reading the guides and doing it yourself!
Here is a short (by no means exhaustive) list of things that you can claim:
Medical (including CASA fee)
Jepp's/Publications
ASIC card
Sunglasses
Luggage
Computer/Laptop including depreciation
Internet/Phone if required to be contactable (who isn't)
Car/Travel expenses (eg: travel between bases/collecting, mail etc...)
Self Education (Uni/ATPL's)
Union Fees
Subscriptions to Professional Journals
Cost of tax agent from previous year
Safety Boots/Safety Gear
Laundry Expenses (up to $150 claimable without receipts)
Now a lot of these will be covered by your employer, but if not make sure they are included in your tax return.
Cheers, HH.
PS: Perhaps others can add to this list!