Thank you for the insight. My experience with this issue is that trying to resubmit does not work for me without clicking Preview first. I had tried to do multiple times. (Even if I rekey the text in or paste it as text only or copy it to a different doc and copy back to try and eliminate any html that for some reason the form thinks affected it.) At least I found a way to work around the annoying & mysterious error messages after trial and error. However it would be nice if someone would debug the problem for the benefit of community users. I am typically using Firefox as the browser, so I don't know if Chrome or others are more compatible. Although ideally web interfaces should be cross browser compatible with mainstream browsers, I have learned that sometimes using a different browser clears up quirky issues. I don't know if that would address this issue but my focus at this point is on finishing the tax return rather than trying to debug quirky web interface behavior.
