After you file

No, when I got to the Wages & Income section. it will not let me edit the entry I need to change. In the very beginning  of the return, it asks what changes have been made this year.  I misunderstood and selected "Received Social Security" even though I've been receiving it for several years already.  Now the whole return is treating it like this is something NEW.  How can I undo selecting it as a change for this year?