- European Court of Justice
- European Union
- Internal Revenue Service
- Italian Collection Agency (Equitalia)
- Italian Customs Administration (Agenzia delle Dogane)
- Italian Government
- Italian House of Representatives (Camera dei Deputati)
- Italian Law (Gazzetta Ufficiale)
- Italian Ministry of Finance
- Italian Parliament
- Italian Real Estate Administration (Agenzia del Territorio)
- Italian Senate
- Italian Statutes and Regulations (Gazzetta Ufficiale)
- Italian Supreme Court
- Italian Tax Administration (Agenzia delle Entrate)
- Italian Tax Materials
- Italian Taxation
- Italian Treasury Department
- Multi-State Tax Commission
- OECD – Tax
