Need to change from "independent" to "dependent" and "someone can claim me" but I don't know how.

I filed for independent on my taxes forgetting that I am going to be claimed on my father's taxes. I don't know how to change this and I need to change it quickly. I've looked at other threads about a Personal Information tab but I can't find that and I've looked on my mobile and on my computer and still can't find anything close to a Personal Information tab. How can I fix this?