Italian tax system is very difficult to comprehend for italian people, not only for million of rules often conflicting each other but expecially for criptic language used.
For non italian people to enter in this system is like enter in a jungle.
Italian Revenue Agency in its website help you to find all information you have to know about it.
In this site you find informations about opening fiscal code ; how to obtain health card,the tax return forms, communication and/or application forms, rules about double taxation.
You find a guide of real estate taxes