Where on turbo tax can I apply tax refund to next years taxes?

To apply your refund to next year see this…….

https://ttlc.intuit.com/community/refunds/help/how-do-i-apply-my-refund-to-next-year-s-taxes/00/26068

To apply your federal refund to next year, enter it under

Federal Taxes Tab or Personal (Home & Business)

Other Tax Situations

Additional Tax Payments

Apply Refund to Next Year - Click the Start or Update button

To apply your federal refund to next year's federal tax, go to Federal Taxes > Other Tax Situations. Under "Additional Tax Payments" click the Start button for "Apply refund to next year."