How to redirect submission to different URL using multiple step form

if I have a multi step form, with a part 1 and part 2,

what should the thank you URL be (in this example above with the orthodontics quiz part 1

and 2) for part 1, if I want part 1 to go to part 2, but part 2 is a separate landing page with the form 

on that landing page as HTML source code?

We have a user guide for this. Please refer to it here

https://www.jotform.com/help/317-Change-Thank-You-Page-URL-Based-on-a-Condition

You can follow the steps. Let us know if you need further assistance.