Unfortunately not. I'm a little frustrated that everyone at TT has suggested that it's possible, but none could give me accurate instructions about how. Eventually I found a number of other people reporting this bug stretching back more than a year, none resolved. Here's a link to the search that turned them up:
https://ttlc.intuit.com/turbotax-support/en-us/help-search?advanced=false&allow_punctuation=false&fi...
Here are some specific issues:
https://ttlc.intuit.com/community/after-you-file/discussion/re-amended-return-keeps-asking-for-a-pay...
https://ttlc.intuit.com/community/after-you-file/discussion/amended-return-keeps-asking-for-a-paymen...
https://ttlc.intuit.com/community/after-you-file/discussion/i-m-amending-my-2019-federal-return-i-ow...
https://ttlc.intuit.com/community/after-you-file/discussion/i-m-at-almost-the-last-stage-of-submitti...
I just gave up and mailed my check to the IRS. The one helpful thing I can share: Submitting the paperwork electronically is possible, but paying is not. So if you're careful with your button selection (I don't remember details, sorry) you're only having to print and mail one page, plus the check. Still annoying, especially since I strongly recommend you send certified mail (which requires a trip to the post office) because I hear the IRS is backlogged and it will be good to prove to them that the check is in their inbox if they ever reach out to you.
