My 1040/1040SR worksheet does no have lines 12a, b, or c. It's just a single line 12.
However, I now see where the What If worksheet has an option to use 2023 tax rates. I'll see how that works out as compared to my hand calculations.
Also, I found a way to get around the problem with overriding the standard deduction when using the 2022 Form 1040. I can just put in a fake capital loss to simulate the difference in the standard deductions between 2022 and 2023. The tax calculation is a bigger problem.
