I live in the state of Illinois and recently donated some of my eggs for IVF. No one can clearly tell me whether I need to pay taxes on the money I received or not. Help?

One organization made me fill out a W-9 form to be able to donate. The other organizations I've worked with can't tell me what kind or if I need to fill out a form for taxes. I also don't know how much money I should set aside if I do have to pay taxes on it. This year, I will have received $30,000 from all the donations.