To get to this section of the Iowa interview in TurboTax Online:
Open TurboTax Online
Select Tax Home in the left pane
On the Hi, let's keep working on your taxes! screen, select the dropdown on the right side of the State Taxes box, then select Start, Continue, or Review/Edit
If the You've already got a head start on state taxes screen appears, select Let's get started. Otherwise, in the left pane, select Prepare State
Proceed through the screens until you come to the Status of your state returns screen
Select Start, Continue or Edit to the right of Iowa
Proceed through the state screens until you get to the Prior Year Federal Tax screen
Enter any federal income taxes paid in 2023 for 2022 or earlier tax years
You can only deduct this amount if you filed an Iowa return in the years for which you paid the federal tax. You can include only the actual federal tax payments made in 2023, but don't include penalties and interest.
what if i am not using Turbo tax online. There is no "Prior Year Federal Tax" screen. There is a "Enter Your federal Tax Info" but that page incorporates the federal refund from the federal return information, and then lists a variety of federal income tax credits, none of which allow for entry of federal taxes paid in 2023 for a prior year.