Okay, so lets do this. First, do not delete the original, incorrect entry until completely done. Once you delete an imported item, you can't re-import it without starting over from scratch.
Let's simply enter the property as a completely new asset, and use the "original" acquisition dates and other information as shown on the 2019 form 4562. See if it sets up for 39 years "and" if the total of the prior depreciation already taken is correct. (remember, for 2020 your prior year's depreciation is the sum of your 2019 prior years depr and current year depr). Somoe other points to make here for when you're entering the numbers.
Reminders:
The default selection is for residental rental. You have to change that to commercial.
COST: from the 2019 form 4562 add together the amounts in the "cost(net of land)" and the "land" box. This is your total cost of the asset and is the amount you enter in the COST box in turbotax.
COST OF LAND: enter the amount in the "land" box of the 2019 form 4562.
See what the numbers for that specific asset look like now.
