You can file an amended return for 2024 to claim the capital loss carryover. Then, if there is a carryover into 2025, you may need to amend that return as well to claim the loss and have the correct amount carried forward to 2026.
Take a look at the following TurboTax help articles for guidance to amend:
How do I amend my federal tax return for a prior year?
How do I amend my federal tax return for this year?
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