How can I post the data from a filled out form to another site

I've built a form with a few pages.

When the user types submit I get the form and their responses in my email.

and they are directed to the thank you page.

I tried directing them to another page on my website where I wanted to use python to parse some of their responses, but it doesnt seem any of the form data is sent to that thank you page?  

You may try creating a post method in your Thank you page.

Here is a guide:https://www.jotform.com/help/213-Send-Submission-Data-via-Post-Method-and-Thank-You-Settings

You may also try using webhooks,it will send the form data with internal submission details.

https://www.jotform.com/help/245-How-to-Setup-a-Webhook-with-JotForm

Hope this information helps.