How Do i report TurboTax State (Iowa) Calculation Anomalies

Does anybody know the appropriate method to contact TurboTax about what I believe are calculation problems with their product when filling out the Iowa state data? I believe there are issues with calculating taxable income adjustments (Schedule 1) and with the actual tax calculation for those are at least 65 years old. If I can't get these resolved, I question whether I will be able to use TurboTax for an accurate state filing.

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