How to add the new field in SC Task which is created manually.

[Anurag Tripathi]

What is the requirement here? what do you mean by add a new field to SC Task?

If you create a new field as admin it will be available for all tasks. 

[akash12345]

Thanks for your reply. I want to add for particular catalog Item.

[Anurag Tripathi]

Why don't you just add a variable on the catalog item instead.

Then Add a ui policy to that run on Catalog item and RITM to hide the Variable

Another UI Policy to show the variable on the sc _task (you can add condition too)

This way you will have a place to enter value manually on the sc_task and also you will avoid creating a field unnecessary