What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Not quite sure if I understand it correctly. Would you like to pull a drop down list from your CSV file and add it on a drop down field in your form? You can just copy the list and past it in the drop down field list.
If you would like to prepopulate the field, I am not sure how it is possible using a CSV file, you can prepopulate our forms via URL parameters, you can check this guide: http://www.jotform.com/help/71-Prepopulating-fields-to-your-JotForm-via-URL-parameters
Perhaps you can share to us more information on how your form actually works. We'll wait for your response.