Get your taxes done using TurboTax

IF you run thru the TaxCaster interview..using expected 2018 data...it displays both a 2017 result as the main result, but also a 2018 result on the same page....Rt-hand side.

Or if you put in your 2017 data, it will show the 2017 result, along with an as-if all income is the same,  2018 result...again on the rt-hand side of the final page...

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Desktop Software users can just open their 2017 tax files
...switch to Forms Mode
....open the "What-IF" worksheet
...transfer all their 2017 values into a 2018 column  (need to check the "2018" box)
........then change whichever values needed to be accurate  for their expected 2018 income and deductions.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*