I was already past the Are your medical expenses more than....and I selected Yes, but then realized I forgot to add something, and can't get back to that on GUI. I do see worksheet but that is harder to enter so I wanted to start over and step through the GUI again. I've noticed a few years in a row this is same behavior on other screens, once you've gone past that can't go back , even though there is the Update button, you can't actually Update anything through the GUI.
