To apply a refund to next year's estimated taxes:
Note. If your return currently reflects a Federal refund amount, this screen will allow you to apply the refund to next year's tax liability.
If you need to apply a State refund to next year's estimated taxes, you would do that by going to the State Q&A Topics section of the interview (the instructions below are general as some state menus will vary):
Note. If your return currently reflects a State refund amount, you can click Continue to advance to the screen where you can select the option and enter the amount of the current year's State refund that you wish to apply to the following year's return.
Once either of these instructions are completed, you will see that the Federal and/or State refund amount in the top of the screen has been reduced to or is now zero, depending on the amount you chose to apply to next year's return.