The "codice fiscale" (tax code) is an alphanumeric code of 16 characters issued for free by the Ministry of Finance to uniquely identify citizens. You need to have your own "codice fiscale" to open a bank account or to sign any contract.In order to obtain your codice fiscale you have to go to the nearest “Ufficio delle Entrate”, according to the area you live in. You can find a complete list of all the local offices in Milano on the website www.agenziaentrate.it

Agenzia delle entrate (main office in Milan)
Via della Moscova 2 (Turati underground stop).
Opening hours: Monday, Wednesday, Friday from 8:30 am to 1:00 pm;
Tuesday, Thursday from 8:30 am to 3:30 pm.
E-mail: dp.IMilano.utMilano1@agenziaentrate.it 
Phone: +39 02 636791

• If you are a citizen of the EU or of one of the following countries: Andorra, Argentina, Australia, Bolivia, Brazil, Brunei, Canada, Chile,China (Hong Kong and Macao only), South Korea, Costa Rica, Croatia, Ecuador, El Salvador,Guatemala, Honduras, Israel, Japan, Mexico, Monaco, Nicaragua, New Zealand, Panama,Paraguay, San Marino, Singapore, USA, Vatican, Venezuela, you only need to bring your passport;
• otherwise you must bring your passport and your residence permit receipt.

At the ”Ufficio delle Entrate” you will be asked to fill out a specific form for the issue of your codice fiscale.