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.
If you meant the facebook pixel code added to the form, you cannot. Our form will filter any type of script code being injected on the form for security reasons.
Also from the facebook pixel guide, the code was meant to be injected in the head tag of custom page. You can review for more details on this same discussion thread.
Let us know if you need further assistance.