Form 40
Individual Income Tax Return
Used by residents (and some part‑year/nonresidents) to report Idaho‑taxable income, claim credits, and compute tax due or refund.
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What is a Form 40 form?
Used by residents (and some part‑year/nonresidents) to report Idaho‑taxable income, claim credits, and compute tax due or refund.
- Collect income statements (W‑2, 1099, K‑
- and prior‑year return.
- Fill in personal info and filing status; add dependents if applicable.
- Enter income, adjustments, deductions/credits using state instructions.
- Attach required schedules and withholding statements.
- Calculate tax, refund, or amount due; include payment voucher if paying by mail.
- Sign and date the return.
- File electronically via the state portal or mail to the address on the form; keep a copy.
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Form 40
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