You have to wait until the smart check is done then you can go back and edit the information that you need to adjust.
As long as you haven't filed yet, you can still make changes
In order to edit a form, you simply go to the "Tools"
link at the bottom left of the screen, and then click "topic search".
You will get a list of all the forms currently in your return, and you
can select the one you want to edit.
Hope this helps