I'm seeing the same problem as well. Married filing jointly, state tax refund auto-populated from TurboTax Online 2019 into TurboTax Online 2020. Under "State and Local Tax Refund Summary my state refund for 2019 is listed as $200, but the true amount was $100. If I click "Edit", I get a screen "Tell us about your refund", and the true $100 amount shows up in "Total Refund Received in 2020". If I change this entry to $1, then go back up to the summary screen, the summary amount now shows $101. So TurboTax seems to have a behind-the-scenes amount ($100) that was copied from the 2019 return, and is then adding it to whatever one types into the "Total Refund Received in 2020" box. So this is either a bug, or confusing labeling for this box (which perhaps could instead be called a "Refund Adjustment" or something like that). So TurboTax techs, what should we do -- enter $0 in the "Total Refund Received in 2020" box?
