Reporting NRSA F32 fellowship stipend not included in W-2

I am a resident alien and a postdoctoral researcher. Last year, my income came from both my university salary and an NRSA F32 fellowship stipend. The W-2 issued by the university does not seem to include the fellowship stipend, as the university does not withhold taxes on it. However, I understand that I am responsible for reporting the fellowship stipend as taxable income. They recommended that I report this myself and consult with the tax preparer. I have not received any other tax forms. 

I have two questions:

1. In addition to entering my W-2 amount in the system, where should I report the fellowship stipend?
2. How can I calculate the fellowship amount? Can I simply subtract FED TAX GRS from TOT GRS on my last pay stub and report the difference as "other income"? Do I need to attach the last pay stub as proof?

Thank you for your guidance.