Hi @ct0420, thank you for posting in the community!  Just to confirm my understanding, is the ‘Due Dates’ field not appearing in the card details panel of your imported cards? 

You should be able to select which fields are visible in the card details section. To do this, select an imported card and click the pencil icon to open the card details panel. From there, click the gear icon to open the settings. 

After that, you should be able to search for the ‘Due Date’ field to add to your cards. 

Once that is completed, you should be able to see the ‘Due date’ field appear in your cards.
 

Please let me know if this is not the case for your, or if you have any questions. We are happy to help!