Please confirm your total contributions reported when Itemizing Deductions on the Iowa state return and taking the standard deduction on your Federal tax return.
Between the adjustment on Line 24 for Charitable Contributions and the amount reported on the Iowa Schedule A, the total contribution amount should be what you intended to report.
See page 36 of the 2020 Iowa Expanded Instructions:
jj. Charitable Contributions Charitable contribution for non-itemizers from federal form 1040, line 10b. The charitable contribution cannot exceed $300. IA 1040, Schedule A may not contain any charitable contributions which were deducted on this line.
This does not say a number cannot be on this line. It says Schedule A contributions cannot also include this $300.
