Do you want to apply some or all of your 2024 refund to 2025? Have you filed 2024 yet? Before filing you can preview the 1040 or print the whole return
https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-f...
To apply part or all of your Federal refund to next year
Federal Taxes Tab or Personal (H&B version)
Other Tax Situations
Additional Tax Payments
Apply Refund to Next Year - Click the Start or Update button
To apply a state refund I think it will be on one of the last screens before you file state.
