No, you can't add a W-2C form for 2024 to your 2025 tax return. You may need to amend your 2024 taxes if your income, taxes, or deductions have changed on the W2-C. Compare the information in boxes 1-20 on your W-2C with your original W-2. If the amounts differ, you can file an amendment for 2024. If the new information doesn't change your original refund or balance due, there's no need to file an amendment.
Please review the TurboTax Help articles Refer to the TurboTax Help articles How do I add a W-2, W-2c or form after I've already filed? and How do I amend my federal tax return for a prior year? for specific instructions.
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