To what document are you comparing lines 16, 19, and 23 of your Form 1040.
The three lines should not match each other.
Line 16 is your total tax.
Line 19 is your total payments and refundable credits
Line 23 is Line 16 less Line 19.
...or..do you mean that 16 - 19 does not equal 23 ?
( they actually use 16 - 19 +24 = 23 )
I have open a case with Turbo Tax case [social security number removed]. This is Turbo Tax bug. I did not get the reply yet.