In the sample Form at https://creator.zoho.com/sampleapps/script-actions/#Form:On_Success we have written an OpenUrl task to open the URL https://creator.zoho.com/support in a new window after you click on Submit.
How to reach the On Add -> On Success section?
- Edit your application (by clicking on Edit this application link, or from the home page, click on the Edit link next to your application)
- Select your Form from the Forms tab.
- Next to the Form name, click on More Actions -> Script (On Add) -> Actions on Success.
This will take you to the On Add -> On Success section of your Form's script. You can drag and drop the deluge tasks from the left side to write your business logic there.