You shouldn't enter this in federal adjustments, 529 contributions are not a federal deduction.
Here is how you can enter your Iowa 529 contributions.
- Navigate to the Iowa section of TurboTax (State Taxes > Iowa)
- Continue through the interview until you arrive at the screen Do You Have Any Personal Adjustments? Since College Savings Iowa or Iowa Advisor 529 Plan is listed, select "Yes."
- Enter the information from the 529 contribution on the line College Savings Iowa, up to $5,800 per Beneficiary
Here is some more information on deducting 529 contributions: 529 Plans and Taxes: Deductions, Tax-Free Withdrawals & More
