Most of the time we need to redirect user after submitting on list on our custom page like Thanks You page.
Here i have custom list by name of “Feedback” and basic page “Thanks”.
When user will submit his/her feedback in library he/she will be redirected to thanks page.
1- Create a basic page for Thanks Message.
2- Name it and press create
3- Go to site navigation Site Settings-> Modify Navigation
4- Select the link of library where you want to submit new item and then want to rout on another thanks page
5- As i have Feedback is List and i am giving path………………
To redirect users to your Thanks/Custom page after they have completed the feedback, simply add ?SOURCE=Your_Thanks_Page.
as i am doing below in this link
6- Now click on new in Feedback List
7- Fill the form and press ok
8- After pressing ok instead of routing in your Feedback library….you will be redirected on Thank You page.