What tax program will allow me to estimate my 2018 taxes right now using the new tax laws for my 2018 quarterly estimates?

[Stinkerbellkity]

Simply open  your return in your 2017 desktop program and click on Forms in the upper right.  Then Click on Open Form which is just above the list of forms in your return on the left.  Then type the word what in the empty search bar right above 2017 US Form 1040.  What-if worksheet appears below.  Click on it to open it.

[macuser_22]

Screenshot of Mac desktop search topics