business registrations and business licensing
NSW Department of Fair Trading

credit and debt
NSW Attorney General's Department
Includes information on debt collection through the Local Courts

government
The NSW Government site
Also includes sites relevant for small business.

The NSW Department of State and Regional Development

Department of State and Regional Development's Small Business

Business Entry Point
Your access to government agencies including the Tax Office

The Australian Securities and Investment Commission

Department of Industry, Science and Tourism

industrial relations
New South Wales Department of Industrial Relations

Commonwealth Department of Employment, Workplace Relations and Small Business

occupational health and safety
National Occupational Health and Safety

Workcover NSW

taxation
Australian Taxation Office

Simple Tax Calculator for Individuals

NSW Office of State Revenue
Information on Payroll Tax