Will Proseries Professional and Proseries Basic automatically calculate the Earned Income Tax Credit and Additional Child Tax Credit for 2020 using 2019 income if using 2019 income provides a more favorable result?
"Automatically", probably not.
They have not updated the "EIC Worksheet" yet, but when they do, you will probably need to manually enter the prior year's income on that. Then you will probably need to check the "yes" or "no" boxes to select if you want to elect to use last year's income or not. But that worksheet should show you the results of using that election or not, so it should be fairly easy to figure out if the election is a good idea or not.