Standard Deduction seems incorrect

I have TurboTax Home and Business 2025 locally on PC.  On Form 1040, my standard deduction for MFJ shows $33,100.  Why is that lower than the allowed $33,500?  I can't change it.  goto supporting forms opens 1040/1040SR Wks also showing $31,100.  got to supporting forms takes me to Schedule A where total itemized deductions are much less than the  standard deduction.  Line 18 has a box to select itemized deductions even though they are less does not work.