I found my own solution.
It appears I was not checking off "no" for questions 7 & 8 under Foreign Assets section.
I overlooked it because it was not in the same format as the other question where the tab to choose yes or no was clearly posted at the bottom of the section. In the case of Foreign Assets the option to choose yes or no was available inside the question in the form of a little circle to fill in. Once I realized that, and filled in the "no" circle for each question in 7 & 8, my taxes were accepted and I wasn't asked to upgrade.
