How do I choose my thank you page?

Hey guys,

I couldn’t find the way to choose a thank you page for a form.
I’m using the plugin in test mode can that be the reason?

And like always I want to add a vote for GetResponse, but on this one I think you have to add as many options as possible + HTML signup form that opens the way to…

But the main thing is to choose a thank you page.

Thanks
Ido