I just followed DMarkM1's instructions carefully, especially the 4th bullet points (in the last two boxes, it has to be totally blank). Make sure no "0" in the last box.
With the last box blank (column f), TurboTax doesn't find error of blank column e (how many days in US for business) anymore. I still think it's a bug for TurboTax to design that way.
However, thanks DMarkM1. I am able to e-file my tax return now. 🙂
