The Inland Revenue - www.inlandrevenue.gov.uk

HM Customs & Excise - www.hmce.gov.uk

Gray's Inn Tax Chamber - www.taxbar.com

Association of Taxation Technicians - www.att.org.uk

Institute of Indirect Taxation - www.theiit.org.uk

Tax Café UK Ltd - www.taxcafe.co.uk

TaxationWeb Ltd - www.taxationweb.co.uk

Taxation Institute of Australia - www.taxinstitute.com.au/

Federation of Tax Administrators (US) - www.taxadmin.org

Bundessteuerberaterkammer (Germany) - www.bstbk.de

Malaysian Institute of Taxation - www.micpa.com.my/

TaxUp - www.taxup.com