TRAC IRS
- Research project based at Syracuse University that collects and reports on IRS enforcement policies and practices.
- http://trac.syr.edu/tracirs/

Allexperts.com
- Volunteers, including tax professionals, answer your questions about taxes.
- http://www.allexperts.com/browse.cgi?catLvl=2&catID=652

TaxAlmanac
- Collaborative tool for online tax research.
- http://www.taxalmanac.org/

Arieh Gavious, Ph.D.
- Articles about transfer pricing, links, and professional information, from a professor at Ben Gurion University.
- http://www.bgu.ac.il/~ariehg/

TaxTopics.net
- Directory of tax guides and resources.
- http://www.taxtopics.net/

Taxman International
- Directory of governmental tax agencies.
- http://www.xs4all.nl/~edvisser/taxman/

TaxCreditResouces.org
- Information about federal and state tax credits for low-to-moderate income families, with online eligibility review. Sponsored by Community Resources Information, Inc.
- http://www.taxcreditresources.org/

The Process of Corporate Tax Harmonisation in the EC
- A legal review concerning coordination among the corporate taxation jurisdictions of the European Union written by Jean-Philippe Chetcuti.
- http://www.chetcuticauchi.com/jpc/research/eu-tax-harmonization.htm

Flinders University International Tax Index
- Australian University's comprehensive directory of online tax resources, listed by country.
- http://www.ssn.flinders.edu.au/commerce/tax/

Will Yancy's Home Page
- Extensive collection of links to tax, accounting, finance, law, and related web sites.
- http://www.willyancey.com/

Internal Revenue Code
- United States Internal Revenue Code, published by Cornell University.
- http://www4.law.cornell.edu/uscode/26/

Tax and Accounting Sites Directory
- A comprehensive index of tax and accounting resources on the Internet.
- http://www.taxsites.com/

The Tax Prophet!
- Original content on U. S. income taxation, plus professional tax articles, newsletters, hot topics discussions and colorful features.
- http://www.taxprophet.com/

Taxaway
- Daily tax tips, tax news items, and helpful information for US and UK taxpayers.
- http://www.taxaway.com/

Sister States Tax Directory
- Links to the web pages for each state's Department of Revenue and official tax forms.
- http://www.sisterstates.com/