Bocconi university does not provide incoming exchange students with the Codice Fiscale. In order to obtain it, you need to apply at the Agenzia delle Entrate with the following documents:
- Passport PLUS two photocopies of the personal data/visa information pages
- Non-EU students: permit of stay (permesso di soggiorno) or a valid study visa
- Completed green and white form provided at the Agenzia delle Entrate
More information can be found at this link.