Sorry that didn't work. What I actually did was I entered the amount for the designated period directly on the Schedule SE form during the review of the Federal taxes - it said I have an error and I should fill-in that amount on the designated line so I just input it manually, but it forced me to take the deferral.
Then I saw the answer I provided a link to. When I went to the Tax Relief related to Covid-19 section, I responded to the prompt that I didn't need more time to pay the tax. That should do it (it worked for me as I had that amount on line 18 completed), but if it takes you to the next screen asking how much you want to defer, it already should have a zero and you click continue and that should do it. So maybe the glitch is it won't input the number when done through the tax relief for covid-19 section - but if you input it manually, it should work - at least it worked for me. If this doesn't work for you, hopefully they will fix it.
