@rjwandkew —
if your husband still has the same work situation, he should ask his employer to begin withholding AZ taxes (and to cease withholding ID taxes). If they are unable to withhold AZ taxes, you will need to make quarterly estimated tax payments to AZ.
As long as he never physically works in ID, his income is not taxable by ID. It is of course 100% taxable by your resident state of AZ.
https://azdor.gov/forms/individual/individual-estimated-tax-payment-form
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
