I don't think the "-1" option is (was?) correct.  

In the prior year, I would have tinkered with the assets to make sure no depreciation was taken (either remove the method, or change it to "99" so no deprec was calculated, OR override current deprec with the "-1".

You could go back to 2018, remove the "-1" you put on Screen 18, then re-proforma after doing the above.

You can also re-enter the PALS (don't forget AMT, and State if different) in the 2019 program (three up from the bottom, right hand side) in Screen 18.