Is there a way for TurboTax to update their 2016 versions so users could calculate taxes under the proposed Republican changes and compare it to their actual 2016 taxes?

[SweetieJean]

This may help:
<a rel="nofollow" target="_blank" href="https://waysandmeansforms.house.gov/uploadedfiles/tax_cuts_and_jobs_act_section_by_section_hr1.pdf">...>

[Hal_Al · Accepted solution]

No. The cost would be too high and the result of limited use with too many uncertainties

[SweetieJean]

and the proposal is likely to change before the final bill is signed into law.