If you are a California resident, be sure to complete the nonresident (Arizona) return first, if required, then your resident California return. California will tax you on income from all states.
You would use Arizona Form 309 if you were an Arizona resident to figure your credit for taxes paid to Arizona and another state or country on the same income. As a California resident, Form 309 doesn't apply to you.
If you did California first and then Arizona, delete both of the state returns and enter them again, Arizona first.
See this help article for more information about filing if you have income from multiple states.
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