T4 Information

I am a student trying to file taxes on my own. I have received a T4 slip from the university as I did a honorarium based role for them which amounts more than $500 in the service fee column of the document. The filing system is asking me to input what kind of service I provided with options being- Business Fess, Professional fees,  Commission fees, Farming fees and fishing fees. If I select any of the first two, it is considering me as self-employed and asking me to add all the information regarding that. But I don't think I am self-employed. So how do I navigate through this?