The area to enter this is actually under the estimated payments section.
Here's how to apply your state refund to next year:
- When you’re going through your state return, after you’ve dealt with any additional entries or adjustments for income and credits and taxes, you’ll reach a screen titled “A few things before we wrap you your state taxes”.
- Scroll down to Other tax forms and click start/revisit across from Make Estimated Payments for Next Year.
- Say “YES” that you want to start the state estimated taxes section now
- Make entries on the next few screens as appropriate.
- You must go through the process to generate estimated payment vouchers in order to apply the refund to the estimates.