Why am I unable to find the thank you page option?

I used the simple regiistration format and Thank You Page is not offered on the settings. Why is that? Do I need to create a new form? This is so frustrating. I am running in circles.

If you do not find the thank you page option under the settings tab of the form builder, then while on the build tab scroll down until the very bottom to find it, here is a guide about it too: https://www.jotform.com/help/499-How-to-Edit-Thank-You-Page-Settings