Here is a list of rates and calculators that may be useful to you:
Tax return essentials
Personal tax essentials
Get a tax file number (TFN)
Residency Status – Arriving in Australia
Work out what you can claim
You have changed jobs during the year
Worked 2 or more jobs
Lost a job or received a payout
Family tax benefit
You studied during the year
You gave donations or gifts
Failure to lodge on time questions
How do I pay?
Understand your tax refund/payment advice
How long does your refund take?