You can grab the template and start making sense of your own money here.
The original version...
You get to enter one number. Whoooo!
You can enter either exempt (salary) or non-exempt (hourly) employment details, and see estimated overall tax and net take-home easily with the current (2018) Federal tax brackets auto-selecting based on calculated gross annual income up to the 24% bracket. If you make more than that, why are you using this sheet? Can't you hire someone for that?