Idaho tax forms & filing.

Things to know about filing in Idaho

• Idaho is a community property state. Married couples filing separately must split community income 50/50 — affects divorce planning, prenups, and pre-marital-property allocations.
• Idaho conforms to the federal Internal Revenue Code on a fixed-date basis, meaning federal changes after that fixed conformity date don't automatically flow through. The legislature updates conformity each year — but conformity adjustments matter for recent federal provisions.
• Idaho's grocery tax credit is a refundable per-resident credit designed to offset the state sales tax on groceries — claimed on Form 40 regardless of whether you itemize.

Idaho community property — different rules from neighboring non-CP states

Idaho is one of nine community property states. Married Idaho residents filing separately must split community income 50/50 between the two returns — affecting divorce planning, pre-marital-property tracking, and inter-state domicile changes.

The community-property structure also affects basis step-up at death (full step-up on the entire asset for community property held by a deceased spouse and a survivor, versus half step-up in non-CP states) — a meaningful estate-planning consideration for Idaho residents holding appreciated community property assets.

When Idaho residents move from non-CP states (most of the country), the rules change going forward for newly-acquired property. Existing assets retain their non-CP characterization unless deliberately retitled or commingled. We confirm at intake for new Idaho residents.

Idaho grocery tax credit — refundable, per resident

Idaho applies state sales tax to groceries — one of a small number of states that does. To offset this, Idaho provides a refundable Grocery Tax Credit per resident, claimed on Form 40 regardless of whether the filer itemizes or takes the standard deduction.

The credit is per-resident (each member of the household qualifies) and is refundable, meaning Idaho residents with no Idaho tax liability still receive the credit as a refund. Senior residents may qualify for an enhanced credit.

Eligibility requires Idaho residency for the qualifying portion of the year. We confirm at intake for part-year residents to allocate correctly.

Where's my refund?

The Idaho State Tax Commission runs the official refund-status tracker. You'll need your Social Security number, filing status, and exact refund amount (in some cases, the tax year and a return-amount input).

Check your Idaho refund status →

Multi-state considerations

If you lived or worked in more than one state during the tax year, you typically file a part-year resident return in each state. If you live in one state and work in another, you usually file as a resident where you live and as a nonresident in the work state — claiming a credit on the resident return for taxes paid to the work state. Reciprocity agreements between some neighboring states change this default; we map this out at intake.

Idaho-specific multi-state nuances are addressed in the quirks list above when they apply.

Get the current-year forms

State tax rates, brackets, and forms change every year. We point to the Idaho State Tax Commission as the authoritative source for current-year information. Form numbers above are stable; rates, deduction amounts, and credit limits are not — always verify before relying on a specific dollar amount.

Open the Idaho State Tax Commission website →