Australian Taxation Office
www.ato.gov.au

Individuals
Individual Home Page

Simple Tax Calculator

Individual Income Tax Rates

Businesses
Businesses Home Page

Tax Withheld Calculator

Superannuation
www.ato.gov.au/super

BAS & IAS
Individuals 

Businesses

Diesel Fuel Infoline
Energy Grants Credit Scheme

Business Entry Point
http://www.business.gov.au/

ABN Verification
http://www.abr.business.gov.au/

Customs
http://www.customs.gov.au/

ASIC Business Centre
http://www.asic.gov.au/

Australian Stock Exchange
http://www.asx.com.au/

Federal Privacy Commissioner
http://www.privacy.gov.au/

Employee or Contractor?
http://www.ato.gov.au/businesses/content.asp?doc=/content/00232435.htm&page=2#P29_2207