Yes. You can import non-standard fields or "custom fields" into your Taguchi database.

Depending on how your customer data is integrated with Taguchi, we recommend that the addition of new custom field data is done either via the subscriber list import functionality or via your current integration (please contact Taguchi Support if you have questions or require amendments to your integration).

If you want to apply custom field data to subscriber records, the creation of these should not be actioned or managed via a subscriber's profile, it should be performed via the custom fields tab in the settings of your organisation.

You may refer to this link for detailed information on Creating new custom fields