I submitted in March and need to amend to uncheck a box under rental information which slightly changes my taxes owed. I've gone completely through the entire return (including printing) to see if that would trick it into knowing this was complete. It says completed but when I open it again.. I cannot get to the first page where I would select Amend.. It even gives me an error on the submit date saying that it has to be today or later, so it must not think I've submitted... please help.