Your reply did not at all answer/resolve my problem. I had already and repeatedly run through all those obvious and intuitive steps that you indicate, with no avail (i.e. the "Review needed" did not disappear and I was stuck there).
Eventually, I had to reset and start over (trashing 3.5 hours of prior work), in doing so I finally figured out what was the root of the problem: it was not in that form, but originated much before in the tax report. In one of the initial forms I was asked whether I had sold stock, to which responded "no" (as I had not sold "stock"); but in fact I had exchanged bonds between two accounts of mine, and apparently that is considered same as selling stock. So my 1099-B was incompatible with that prior answer, no matter what.
