Is turbotax taking into account aspects of the new tax law in its calculations of estimated tax payments for 2018?

[NikBob]

In using data entered, and in subsequent reasonable responses to software questions, results vary from $631 to $0 per quarter.

[Critter]

Since the IRS has not issued any guidance or forms for a lot of the 2018 tax law changes and will not for some time the TT program cannot take into consideration those changes however for what is known the program is working correctly.  This year you may need to revisit the estimated payment section often to see what changes effect you.  You can always use the safe harbor method and pay in the min required 100% or 110% of the prior year tax liability instead of trying to get an actual figure.