I have not yet e-filed my 2019 taxes but I was almost done w them on Turbo Tax when I realized I need to change my dependent info on my federal return. On Turbo Tax how do I get bk to where I can chan

I just want to change my dependent info on my 2019 federal return. I was almost done with my taxes and now I need to change my dependent info on my federal return. How do I get back to my 2019 federal