I cant get the trello app to update with my form. Is there something I need to do in Trello?

I would recommend you to check that you have successfully authorized the Trello app to access your Jotform account. You can check your authorized apps here: https://www.jotform.com/myaccount/api 

Also, please check this guide that will help you integrating JotForm and Trello: https://www.jotform.com/help/454-Using-the-JotForm-Power-Up-in-Trello 

I hope this helps.