Redirect on submission

I would like a “thank you” page to open up when someone clicks submit on the form I’ve created. I don’t need this page to open up in a different tab, just in the same one. So, fill in the form, click submit and the “thank you” page appears. Is that not possible?

I have been through about 6 different form plugins and finally found Ninja Forms does everything I need, except this!! Can you help?

Thanks

The page I need help with: [log in to see the link]