You will file one federal return and then a non resident CA return and a resident AZ return and you MUST complete them in that order in the Turbotax program to get the correct credit on the AZ return for the taxes paid to CA.
I think it's reversed for an AZ Resident/CA non-resident situation. CA/AZ cross border workers prep taxes in a different order from most of the rest of the country. The AZ Resident is done first, then the credit is on the CA non-resident tax return.
"Important: As an Arizona resident, nonresident returns filed with the following states DO NOT QUALIFY for the credit on the Arizona return: Alaska, California, District of Columbia, Florida, Indiana, Nevada, New Hampshire, Oregon, South Dakota, Tennessee, Texas, Virginia, Washington and Wyoming.
You may be able to claim a credit for taxes paid to Arizona on the nonresident return filed with any of those states listed above."
top of page 2 of the 2019 AZ form 309 instructions:
https://azdor.gov/forms/tax-credits-forms/credit-taxes-paid-another-state-or-country
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A bigger issue I see is whether the husband might really be considered a CA resident by CA, with 4-5 nights a week in CA all year....and only one year? or continuing to be the case for for several years?? Those who push the 6 month limit (183+ days) living in CA are getting themselves into a hazy area. (but that's just a personal opinion)