Because you're a grad student, you're only eligible for the Lifetime Learning Credit (LLC).
If you are eligible, you have answered something wrong, in the interview. But, a lot of people are just not eligible.
https://www.irs.gov/individuals/llc
https://ttlc.intuit.com/questions/3383321-why-didn-t-i-get-a-credit-or-deduction-for-education-expen...
https://www.irs.gov/credits-deductions/individuals/education-credits-questions-and-answers
If you can't find your error, delete it and start over. Go through the entire education interview until you reach a screen titled "Your Education Expenses Summary". Click delete next to the student's name. You'll then get the "Your Education Expenses Summary" screen again. Click the "Add a student" button.
