His income should not be taxed in the nonresident state.
Depending upon your nonresident state, sometimes the forms do show the amount of total income, but then the amount calculated on the state portion will only reflect the nonresident state sourced income. Many times this is done as a percentage.
Please comment on your resident state and nonresident state and we can direct you accordingly to ensure you are only taxed on your state sourced income for your nonresident state.
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