Hello Zorawar
I have already provided the solution for this in your other query. Still let me explain it again -
You have selected the object required tick for this CR type. Make sure you select single processing too so that once these details are added user can click on individual record and select the single processing to fill up entire data.
Other way is fill up these details and then route this CR to the requestor's inbox where they able to add the details.
No need to modify the screen.
Kiran