Can I get dollar per dollar contribution using a AZ tax form 323? How do I add it using the standard single form?

You can get a credit on your Arizona return for contributions made to a private school tuition organization.

For tax year 2018, this credit is limited to the lesser of $555 ($1,110, if married filing jointly) or your Arizona tax.

You can enter this information by selecting "I donated to an Arizona private school by April 15, 2019" on the Arizona screen titled "School Tax Credits"