ADS is required for property outside of the United States.
However, if the property was "placed in service" in 2018, TurboTax is incorrectly using 40 years. For Residential Rental Property that is "placed in service" in 2018 or later, ADS should be 30 years.
We reported the error to the developers almost a month ago, but if it is still showing 40 years for you, apparently they still have not fixed it. You will need to either wait until they fix it (if they ever fix it, which could be possible) or use another method to file your tax return.
