Form 1116 - Amount for line 18 calculated by TurboTax seems to be incorrect

[SuKu]

I have prepared my 2025 Federal tax return using TruboTax Deluxe Desktop.

When I click the magnifying glass next to the amount on line 18 (Individuals: Enter the sum of (i) Form 1040, 1040-SR, or 1040-NR, line 11b, minus Form 1040, 1040-SR, or 1040-NR, line 14, and (ii) Schedule 1-A (Form 1040), line 37.), it takes me to the total at the bottom of page 2 on 1040/1040SR Wks and the two amounts do not match. What could be the explanation for this difference?

[Mike9241]

@SuKu there is no error.  the proper interpretation of line 18 instructions is 

line 11 + line 37 from Schedule 1-A less line 14 

note that line 14 includes line 13b which includes line 37 from Scheule 1-A so if you were to subtract line 14 and then line 37 from Schedule 1-A you'd be subtracting the senior deduction twice. 

[SuKu]

@Mike9241 I am not eligible for the senior deduction, and I do not see Schedule 1-A form either. So, I used 0 for it. I recalculated the number and it does not match the number computed by TurboTax. The difference between the numbers computed using your formula and TurboTax is exactly the same as the State Income Tax paid. I do not understand why TurboTax is deducting Standard Deductions and State Income Tax paid from the AGI. I expected the number to be the same as what I got using your formula.