How to get Release / Deliverable based selected Iteration (attribute of Work Item)? How to get Global Configuration URI selected for CCM Project Release?
One answer
I'd suggest to read the answer https://jazz.net/forum/questions/273240/how-to-get-work-item-planned-for-attribute-value-of-kind-iteration-through-api/273257 to your prior question and search that blog.
Please do not spam this forum with badly written questions (see How should I ask a question in the Forum if I want to receive useful answers?) for each part of the API.
Use internet search on this form e.g. seach for "Planned For API site:jazz.net". Or something.