Assuming this has something to do with a state return and further assuming the state is Maine (37 states tax personal income) if you are using the online version you can't change anything from a review screen or on the form itself. You have to work back through the interview section of the program that pertains to that schedule. I don't use the online version but I think under tools on the left you can elect one of the options that will take you back to the start of the state return or maybe to that particular section of the interview in the state return.