Thanks for reaching out to us for help. Unfortunately, the new page cannot be opened in the same page after redirection, but redirection in another tab is available. However, we can edit the Thank You Page, to redirect on click. Let me walk you through it, step by step:
Go to the Form’s Settings page, open the Thank You Page tab
Click on the Source Code icon, and it will open a tab.
Find the link you have inserted, in my case, it is “https://www.google.com”. Add the following attribute: target=”_parent”
It is supposed to redirect in the same tab.
Give it a try and let us know if you need any other help.