The answer to your question is that you should consider an amount equal to $30,000, minus fees paid to your university as a condition for enrollment, or for specific courses, as your taxable fellowship (stipend) income. The citation for this is (2016) IRS Publication 970, Page 5, which reads in part:
"Qualified education expensesFor purposes of tax-free scholarships and fellowship grants, these are expenses
- Tuition and fees required to enroll at or attend an eligible educational institution; and
Course-related expenses, such as fees, books, supplies, and equipment that are required for the courses at the eligible educational institution. These items must be required of all students in your course of instruction."
Here is a courtesy link to IRS Publication 970 (Tax Benefits For Education) for reference:
Once you determine how much of the remainder of your $30,000 fellowship stipend constitutes taxable income, then you can enter it into TurboTax (and thus onto your actual tax return) by following the process outlined in the following answer recently provided to another graduate student with fellowship income. Here is a clickable link to that discussion:
Thank you for asking this important question; and good luck with your graduate studies.