Enter the contributions on your Arizona State return. TurboTax should ask about that during your State tax interview.
"Over 30 states, including the District of Columbia
currently offer a state income tax benefit or tax credit for 529 plan
contributions. In most cases, the taxpayer must contribute to their home
state’s 529 plan to qualify for a state income tax benefit. However, there are
seven tax parity states that offer a state income tax benefit for contributions
to any 529 plan:
- Arizona
- Arkansas
- Kansas
- Minnesota
- Missouri
- Montana
- Pennsylvania"
https://www.savingforcollege.com/article/how-much-is-your-state-s-529-plan-tax-deduction-really-wort...
