According to the DPCM of December, 3rd 2020, people are allowed to entry in Italy to return home or to a place of residence. Moreover partners living abroad can now enter Italy to reach the person with whom they have a stable emotional relationship, even if not cohabiting.
For more information
All travellers entering Italy must comply with the regulations of the Region they are visiting and must self-isolate in their hotel or accommodation for 14 days.
Visa applicants have to contact TLS Visa Center in order to schedule an appointment https://it.tlscontact.com/am/EVN/index.php