International Organisations
| OECD | Organisation for Economic Cooperation and Development |
| IOTA | Intra-European Organisation of Tax Administrations |
| IFA | International Fiscal Association |
| ITD | International Tax Dialogue |
| CIAT | Inter-American Centre of Tax Administrations |
| Centre de fiscalité européenne |
| Chartered Institute of Taxation |
| Essential Links to Tax Sites |
| International Bureau of Fiscal Documentation |
| Institute of Fiscal Studies of Spain |
| Institute of Taxation in Ireland |
| Institute of Taxation in Ireland - Tax links |
| Nordisk eTax |
| UK Institute for Fiscal Studies |
| CFE | Confédération Fiscale Européenne |
