You really need to talk to your accountant about what tax you need to pay & how it works as alot of what you have posted is very wrong.
If you are day-trading then you wont be entitled to the CGT discount for holdiong shares for 1year+, you will be classed as a Professional Trader ask your accountant about that.
Below is the tax rates for 2011:
Tax Rates 2010-2011
Taxable Income
Tax on this income:
$0 - $6,000 Nil
$6,001 - $37,000 15c for each $1 over $6,000
$37,001 - $80,000 $4,650 plus 30c for each $1 over $37,000
$80,001 - $180,000 $17,550 plus 37c for each $1 over $80,000
Over $180,000 $54,550 plus 45c for each $1 over $180,000
