Map It Out First:
Before importing contacts with custom fields, you'll first need to map it out.
Go to System Settings.
The "Details" tab is the information that shows on the main tab of a contact record. Click on the pencil to edit and add custom fields.
Add a Custom Field:
Add the Custom Field and Save:
Property Address Added & Save:
Map out your custom fields and Import your CSV file:
Go to Contacts and preview your uploaded contacts: