Based on your response, I dug a little deeper and believe I've found the actual problem...
My wife and I each had 2 recharacterizations for our 2019 contributions. Both sets were reported with our original 2019 taxes. So we don't need to amend our 2019 taxes. Neither has to be reported on our 2020 taxes and... as you pointed out, the corresponding 1099-R is just ignored.
The actual problem is that the basis for my wife that was calculated by TurboTax on our 2019 taxes wasn't carried forward (imported) correctly even though it claims to have been copied. The 2019 line is correct (based on my understanding of the calculation), but the value on our 2020 worksheet is $0. My basis calculated by TurboTax on our 2019 taxes was carried forward correctly -- the line on our 2019 taxes matches the value on our 2020 worksheet.
Unfortunately, I'm going to need to have a tax accountant review my 2019 and 2020 taxes to make sure I'm correct.
