First, confirm that 40 years is correct.  Is this Nonresidential Real Property?  Or Residential Rental Property that was placed in service before 2018 (after 2017 would be 30 years)?

On the Asset Entry Worksheet, scroll WAY down to the bottom.  I *THINK* it is the one called depreciation "method" that you need to change to "Alternative" (or maybe it is "Alt").  That will change it to ADS depreciation (which is required for foreign property).