Fellowship Stipend

Hello, I am receiving a fellowship stipend which I believe is not considered wages and we are required to pay our quarterly taxes on our own. I have a moonlighting position at another employer (Locums) where I do a shift every now and then and those would be considered wages. Do I pay no FICA tax on the stipend and yes FICA tax on the Locums? How do I fill out the tax form to account for the differences when I pay quarterly 

taxes?