An additional comment.
I noticed that Turbotax perpetually updates. The moment it updates a submitted return, the status of the new return must move it to an amended category and must be notated in the name or suffix of the file. After that, it is up to the user to decide whether or not to submit the amended return. In my case, a credit card that applied to a business account was not updated in Quicken, so did not make its way to the expense column of my business. Amending the return resulted in a substantial decrease in liability and I should have received an additional refund. As it is, my actual refund is less than it would be because the updated return was the one that got amended, and that return also had a reduced liability compared to the original, but which I lost out on because of the process. Moreover, the IRS has not responded with the expected refund and that's probably because they can't make sense of the amendments as shown on the amended form.
