IF you buy, download, install the 2017 Desktop software, you can fill that in with all your 2017 tax data, adn check that it matches what you actually filed for 2017 too.
Then go to a What-IF worksheet in Forms Mode and transfer the $$ from the 2017 column to any/all of 3 other columns......check the 2018 box, and you'll see what the same $$ would be taxed with 2018 tax laws...AND you can change the $$ directly in each of the additional 2018 columns at-will. See attached picture. I've tested and it includes most of the 2018 changes, but there may be some fine points that it doesn't capture yet...which ones, I wouldn't know.
(You will have to buy new 2018 software when 2018 comes around early in 2019...each year is specific for that year, except for the What-IF sheet)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
