This is question 103a on the paper FAFSA.
A Federal School Code is always six characters, beginning with 0 (zero), G, B, or E and ending with a five-digit number. For example, 003223 is the Federal School Code for the University of Oregon.
Enter the Federal School Code for the college you’re interested in attending and click Search. If a match is found it will display in the Search Results table. If the college you were looking for displays, click Add to add it to your list of Selected Schools.
If you don’t know the Federal School Code, you can instead search for the college by selecting the state, and entering the college’s name and / or city.