I started my return originally on the web on desktop. I have a few things to go back and clean up, plus I wanted to review my return again. I was hoping to be able to just do that on my phone from the comfort of the couch, but navigation in the app to go back to previously completed sections is absolutely horrible. They also provide a list of things that need to be fixed when you go to file, along with links to the sections, but they don't seem to take you to the right place.