I just went in again and I still have the same problem. The only way to fix it was delete the return and start over. When I do that, answer the questions the same way. I am allowed to continue. Question: I exercised stock options in 2014, which is what triggered me to answer a question and get into the upgrade issue. Just to clarify, you surely do not have to upgrade just to file a return that includes the exercising of a stock option?
