For the European Union's customs and taxation website:
http://www.europa.eu.int/comm/taxation_customs/index_en.htm

For links to joint European Union - Member State customs and taxation databases (for quota consultations, Binding Tariff Informations (BTI's), etc.):
http://www.europa.eu.int/comm/taxation_customs/common/databases/index_en.htm

For an explanation of the customs policy of the European Union:
http://www.europa.eu.int/comm/publications/booklets/move/19/txt_en.htm

For links to Member States' and Candidate Countries' customs websites:
http://www.europa.eu.int/comm/taxation_customs/common/links/customs/index_en.htm

For an explanation of the taxation policy of the European Union:
http://www.europa.eu.int/comm/publications/booklets/move/17/index_en.htm

For links to Member States' and Candidate Countries' taxation websites:
http://www.europa.eu.int/comm/taxation_customs/common/links/tax/index_en.htm

The following allows you to research the tariff schedule of the European Union, the "TARIC" by product code, description, and / or country of origin:
http://www.europa.eu.int/comm/taxation_customs/dds/en/tarhome.htm

Finding tax and tariff information for your exports:
http://www.trade.gov/td/tic/tariff/index.html