In School Deferment Request - This form would be used to notify the U.S. Ed. Dept. that you are now enrolled at least half time and are requesting your existing Federal Direct Student Loan payments be deferment status.
If you have student loans that were from other lenders, you will need to contact them directly to see if they require a specific form to be completed.
Chadron State College does also report all students who are enrolled at least half time to the National Student Clearinghouse.