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Your capital losses should carry forward automatically to sch D. Short term to line 6 and long term to line 14. See:  

• 2024 Instructions for Schedule D - Capital Gains and Losses
• What is a capital loss carryover?

Please review your sch D. If you do not see them, contact support. Your prior losses will be used against current gains first.

Yes, carryforward on Federal Returns works ok in Turbo Tax.  

My question was, why didn't the carryforward of a simple stock market loss carry forward to the forms on my 2024 California return.  Turbo Tax has to know that in this case the carry forward works just like on the Federal Return. I had assumed this, so missed it.

Greg Nash

Yes, California also allows capital loss carryovers. However, unlike the federal government, California makes no distinction between short-term and long-term capital gains. It taxes all capital gains as income, using the same rates and brackets as the regular state income tax. Check the Federal and California worksheets in your 2023 return for any differences.

See the Instructions for California Schedule D for more information. Near the end of the instructions is the "worksheet" for capital loss carryovers:

California Capital Loss Carryover Worksheet

1. Enter loss from Schedule D (540), line 11, as a positive number.
2. Enter amount from Form 540, line 17.
3. Enter amount from Form 540, line 18.
4. Subtract line 3 from line 2. If less than zero, enter as a negative number.
5. Combine line 1 and line 4. If less than zero, enter -0-
6. Enter loss from Schedule D (540), line 8, as a positive number.
7. Enter the smaller of line 1 or line 5.
8. Subtract line 7 from line 6. This is your capital loss carryover to 2025.

When you prepare the California return in TurboTax, at the screen "Here's the income that California treats differently", under Investments, you can click on the item "Capital Loss Carryover from Last Year" and make any needed adjustments.

@jgn

You didn't really answer my question.  I'm aware of the differences between CA and Federal capital losses, just as Turbo Tax is.  What's confusing is that TT doesn't do the carry forward for a simple capital loss (as distinguished from others) on my CA return automatically.  Because it does so for the Federal return, you'd think it would for the CA return, so when it doesn't it is easy to miss, as I did.