For my CT state return Turbo tax calculated my tax due on the Tax Calculation Schedule but put a different amount on line 6 of the CT-1040 form. Anyone know why?

I may be that you have a penalty or interest due for late payment of tax that is being added to your tax due. You would see that on line 27 or 28 of your form CT-1040.

No, there is $0 on line 27 and 28.

The figure on line 10 of the "Tax Calculation Schedule" is lower than the figure on line 6 of CT-1040