Deductions & credits

I looked more closely and I am not sure if turbotax does it correctly or not.  The instructions say:

Also, transfer the amount from:

  • Line 23, column B to Form 540, line 14
    If column B is a negative number, transfer the amount as a positive number to Form 540, line 16.
  • Line 23, column C to Form 540, line 16
    If column C is a negative number, transfer the amount as a positive number to Form 540, line 14.

I have for 23B a negative number say, -300 for example

I have for 23C a positive number, say 500 for example

So it says to enter 300 in 540 line 16.  It also says to enter 500 in 540 line 16.  What got entered by turbotax in 540 line 16 was 300+500 = 800.  No idea if this is correct since the instructions do not say to add the 2 numbers together.