Hello @JavierL65 ,
If you're needing to add multiple physical addresses for contacts, you can add extra address bars through custom fields (e.g. address2, state2, country2, zip code2, etc). Then those will be available as options when you import contacts.
You can manage your custom fields through the Contacts tab or the My Account tab. Make sure to check the link in my earlier message for a full overview and visual aids regarding custom field management.