AskTaxGuru
   Forum for discussion of tax issues.
   http://www.asktaxguru.com

Australian Taxation Office
   Tax information for individuals, Companies and organisations, from the Tax Department of the Australian Federal Government.
   http://ato.gov.au/

Boon Docks, Inc.
   Compilation of US withholding and unemployment tax rates.
   http://www.tax-tables.com/

IRS
   The U.S. government agency responsible for tax collection and tax law enforcement. Includes income tax forms, instructions, and agency publications.
   http://www.irs.gov/

IRS Audit Infrormation
   How to prepare, what to expect, the different types of audits, and taxpayers’ rights during an audit.
   http://www.irs-audit.net/

Inc.com
   Information and resources on law and taxation for small businesses and entrepreneurs.
   http://www.inc.com/guides/legal/

Phoenix
   Consultancy offering articles on a variety of tax subjects.
   http://www.phoenixwm.com/

Tax Facts Center
   Tax information for citizens, policy analysts, legislators, and the press. A joint project of the Urban Institute and Brookings Institution.
   http://www.taxfactscenter.org

TaxLaw.be
   Links and information concerning Belgian and international tax law.
   http://www.taxlaw.be/

TaxMama
   Articles on a broad range of tax subjects.
   http://www.taxmama.com

The Tax Resource Group
   Tax Research, consulting and research for attorneys, CPAs and EAs.
   http://www.taxresourcegroup.com

Uncle Fed's Tax Board
   Providing information on the United States tax system, filing a tax return, and problems that may be encountered by taxpayers. Also offers links to downloadable tax forms.
   http://www.unclefed.com