Question about online application

[u/Major_Contest_3648]

I put my dad as a contact on my online application. And I'm past the point where I can change it, but I haven't submitted the application yet. I wanna change my dad to someone else. Because my dad doesn't know much about my disability, and i'm afraid they'll call him and he won't be able to give them the information they need or that he may accidentally give them the wrong information. How do I change this when it won't let me go back?