To get through this screen I just entered 12/31/2020 (i.e., the final day of the 2020 tax year) for all four times I was asked the question. Having now completed all data input and printed a preview tax return, I see that the form now states that my two children both resided in our household only from 12/31/2020 to 12/31/2020…! I've tried to go back in and correct this information, but haven't found a way to do so. As a result, I find myself in the infuriating position of being forced to choose between: i) knowingly submitting incorrect information on my tax return; ii) printing the whole DC return in order to manually correct the error, and then filing by mail; and iii) delaying filing until even closer to the deadline in hopes of getting help from TurboTax (and/or this community).
