Templates Tax Law Tax Audit Protest and Appeal — Idaho
Idaho Tax Law
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Tax Audit Protest and Appeal — Idaho

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Tax Audit Protest and Appeal (IDAHO)

Quick-Reference Summary

Item Idaho Authority
Taxing authority Idaho State Tax Commission (ITC)
Audit document Notice of Deficiency Determination (NODD)
First-level review ITC Appeals Unit (independent of audit unit)
Hearing format Informal hearing — conference style, no oath, no rules of evidence
Final administrative decision Tax Commission Final Decision under Idaho Code § 63-3045B
Alternate appellate forums BTA, if § 63-3049 permits it, OR District Court; BTA is unavailable for corporate-income, sales, or use tax when the amount asserted exceeds $25,000
Protest deadline (general) 63 days from NODD mailing (Idaho Code § 63-3045(1)(a))
Protest deadline (special) 30 days for IFTA / IRP / Idaho Full Fee Registration / Sales-Tax Jeopardy Assessment
Perfection cure window 28 days from ITC's incomplete-protest letter (§ 63-3045(1)(b); IDAPA 35.02.01.320)
Appeal of final decision 91 days from receipt to BTA or district court (Idaho Code § 63-3049)
Security before either review route 20% of the amount asserted in cash, or other security acceptable to the Tax Commission (§ 63-3049(b))
BTA appeal De novo; parties must present anew the evidence and argument they want considered (IDAPA 36.01.01.010(5))
Onward review BTA → district court under Rule 84, ordinarily within 28 days (de novo, § 63-3812); district court → Idaho Supreme Court
District-court burden after BTA Party seeking affirmative relief; preponderance of the evidence (§ 63-3812(c))
SOL on income-tax deficiency notice 3 yr general; unlimited for fraud, willful evasion, or non-filing subject to § 63-3068(d)'s exception; no current 25%-omission extension
Refund-claim window 3 years from due date or original return filing (§ 63-3072)
Governing rules IDAPA 35.02.01 (ITC); IDAPA 36.01.01 (BTA)
ITC mailing address Idaho State Tax Commission, P.O. Box 36, Boise, ID 83722-0410
BTA address Idaho Board of Tax Appeals, P.O. Box 83720, Boise, ID 83720-0088 (confirm current form)

Part A — Informal Conference Request Letter (Pre-Final-Decision)

[TAXPAYER / FIRM NAME]
[________________________________]
[Street Address]
[________________________________]
[City], Idaho [ZIP]
Telephone: [________________________________]
Email: [________________________________]
Idaho Permit No. / EIN / SSN: [____________]
ID Bar No.: [____________] (if attorney)

Date: [__/__/____]

VIA CERTIFIED MAIL, RETURN RECEIPT REQUESTED
AND VIA EMAIL (if Appeals Specialist has provided address)

TO:
Idaho State Tax Commission
Appeals Unit
P.O. Box 36
Boise, ID 83722-0410
Attn: [Appeals Specialist Name, if assigned]

RE: Request for Informal Hearing Following Perfected Protest
Taxpayer: [TAXPAYER LEGAL NAME]
Idaho Tax ID: [____________]
Case / Docket No.: [____________]
NODD Mailing Date: [__/__/____]
Perfected Protest Filed: [__/__/____]
Tax Type: ☐ Individual Income ☐ Corporate Income ☐ Sales/Use ☐ Withholding ☐ Fuels ☐ Cigarette/Tobacco ☐ Other: [____________]
Period(s): [__/__/____] – [__/__/____]
Amount in Dispute: $[__________]

Dear Appeals Specialist:

In response to your hearing-rights letter dated [__/__/____], Taxpayer hereby elects an informal hearing under Idaho Code § 63-3045(2) and IDAPA 35.02.01.310 to discuss the perfected protest on file.

1. Hearing Format. ☐ In person at the Boise office. ☐ By telephone. ☐ By videoconference if available.

2. Available Dates. [____________________________]

3. Issues to be Discussed.

Issue NODD Adjustment Amount Taxpayer's Position
[____________] [____________] $[__________] [____________]
[____________] [____________] $[__________] [____________]
[____________] [____________] $[__________] [____________]

4. Additional Documents. Pursuant to your letter, Taxpayer will provide the following documents at or before the hearing:
☐ Federal Forms 1040/1120/1120-S; ☐ Idaho returns Forms 40/41/65/66; ☐ Federal RAR / closing letter; ☐ Resale certificates / ST-101 exempt-sale certificates; ☐ Apportionment workpapers; ☐ Bank statements; ☐ General ledger and trial balance; ☐ Invoice samples; ☐ Other: [____________].

5. Representation. Counsel is authorized by Power of Attorney (Form ITC POA-ID) on file.

6. Recording. Taxpayer ☐ does ☐ does not intend to record the hearing at its own expense.

7. Settlement Authority. Taxpayer requests that the Appeals Specialist or Tax Commissioner consider settlement of the disputed issues under Idaho Code § 63-3045B and IDAPA 35.02.01.

Respectfully,

[________________________________]
[Name, Title]

Part B — Formal Protest / Petition

BEFORE THE STATE TAX COMMISSION
STATE OF IDAHO

Party Role
In the Matter of the Protest of
[TAXPAYER LEGAL NAME], Petitioner
Idaho Tax ID No. [____________]

DOCKET NO. [TO BE ASSIGNED]

PERFECTED PROTEST OF NOTICE OF DEFICIENCY DETERMINATION
(Idaho Code § 63-3045; IDAPA 35.02.01.320)

TO:
Idaho State Tax Commission
Appeals Unit
P.O. Box 36
Boise, ID 83722-0410

Date Mailed (postmark controls): [__/__/____]

I. Petitioner Identification (IDAPA 35.02.01.320.01.a)

  1. Name: [TAXPAYER LEGAL NAME]
  2. Address: [____________________________]
  3. Tax Identification: ☐ SSN [____-__-____] ☐ FEIN [__-_______] ☐ Idaho Permit No. [____________] ☐ ITIN [____________]
  4. Telephone / Email: [____________] / [____________]
  5. Authorized Representative: [Name, ID Bar No., Firm, Address, Phone, Email] (POA Form attached)

II. NODD Information (IDAPA 35.02.01.320.01.b)

  1. NODD No. / Letter ID: [____________]
  2. Issuing Bureau: ☐ Audit ☐ Tax Discovery ☐ Income Tax ☐ Sales/Use ☐ Compliance ☐ Other: [____________]
  3. Mailing Date of NODD: [__/__/____]
  4. Tax Type: [Individual Income / Corporate Income / Sales-Use / Withholding / Fuels / Tobacco / Other]
  5. Tax Period(s) at Issue (IDAPA 35.02.01.320.01.b): [__/__/____] – [__/__/____]
  6. Amounts Asserted: Tax $[__________] / Penalty $[__________] / Interest $[__________] / Total $[__________]
  7. Timeliness: This protest is postmarked within 63 days of the mailing date of the NODD and is timely under Idaho Code § 63-3045(1)(a). [☐ 30-day deadline applies (IFTA/IRP/Full Fee/Jeopardy); this protest is postmarked within 30 days.]

III. Specific Items Disagreed With (IDAPA 35.02.01.320.01.c)

  1. Petitioner disagrees with the following adjustments and amounts:

a. [Adjustment 1 — e.g., disallowance of resale exemption for $______ in sales to customer ____________].
b. [Adjustment 2 — e.g., apportionment factor reset from ____% to ____%].
c. [Adjustment 3 — e.g., NOL disallowance for tax year ____].
d. [Penalty under § 63-3046(b) — _____% accuracy / negligence].

IV. Factual and Legal Basis for Objection (IDAPA 35.02.01.320.01.d)

  1. Basis 1 — [Substantive issue, e.g., Resale Exemption Properly Documented]:
    Facts: [____________________________________________________________]
    Law: [____________________________________________________________]

  2. Basis 2 — [e.g., Three-Factor Apportionment Under Idaho Code § 63-3027]:
    Facts: [____________________________________________________________]
    Law: [____________________________________________________________]

  3. Basis 3 — [e.g., NOL Carryforward Allowed Under § 63-3022(c) / IRC § 172]:
    Facts: [____________________________________________________________]
    Law: [____________________________________________________________]

  4. Basis 4 — [e.g., Penalty Abatement for Reasonable Cause Under § 63-3046(b)]:
    Facts: [____________________________________________________________]
    Law: [____________________________________________________________]

  5. Basis 5 — [e.g., SOL Bars Assessment Under § 63-3068]:
    Facts: [____________________________________________________________]
    Law: [____________________________________________________________]

V. Relief Requested

  1. WHEREFORE Petitioner respectfully requests that the State Tax Commission:

A. Cancel the NODD in its entirety, or in the alternative reduce it by $[__________];
B. Abate all penalties for reasonable cause under Idaho Code § 63-3046(b);
C. Adjust interest in conformity with the adjusted tax;
D. Schedule an informal hearing before an Appeals Specialist under Idaho Code § 63-3045(2);
E. Hold open the right to a Formal Decision in writing in lieu of hearing if elected;
F. Grant such other relief as is just and proper.

VI. Representation and Election

  1. Petitioner is represented by [Counsel Name], who is authorized to act on Petitioner's behalf in all matters under Idaho Code § 63-3045 and IDAPA 35.02.01. Power of Attorney is filed concurrently.

Dated: [__/__/____]

[________________________________]
[Petitioner / Authorized Representative]
ID Bar No. [____________]
[Address] · [Phone] · [Email]

ATTACHMENTS

  • Exhibit A — Copy of NODD dated [__/__/____]
  • Exhibit B — Power of Attorney (POA-ID)
  • Exhibit C — Federal returns (Forms 1040/1120/1120S/1065) for the periods
  • Exhibit D — Idaho returns (Forms 40/41/65/66) for the periods
  • Exhibit E — Resale certificates (ST-101), apportionment workpapers, NOL schedules

Part C — Appeal Cover Letter to Tax Tribunal / Court

C-1. Notice of Appeal to Idaho Board of Tax Appeals (Post-Final Decision)

[FIRM LETTERHEAD]

Date: [__/__/____]

VIA CERTIFIED MAIL, RETURN RECEIPT REQUESTED

Idaho Board of Tax Appeals
P.O. Box 83720
Boise, ID 83720-0088

cc: Idaho State Tax Commission, P.O. Box 36, Boise, ID 83722-0410

RE: Notice of Appeal — [Taxpayer], ITC Docket No. [____________]

BEFORE THE BOARD OF TAX APPEALS, STATE OF IDAHO

Party Role
[TAXPAYER NAME], Appellant
v.
IDAHO STATE TAX COMMISSION, Respondent

BTA No. [TO BE ASSIGNED]

NOTICE OF APPEAL UNDER IDAHO CODE § 63-3049

Pursuant to Idaho Code § 63-3049 and IDAPA 36.01.01, Appellant [TAXPAYER NAME] hereby appeals to the Idaho Board of Tax Appeals from the Final Decision of the Idaho State Tax Commission entered [__/__/____] in Docket No. [____________], a copy of which is attached as Exhibit 1.

  1. Decision Appealed From. Final Decision of the State Tax Commission dated [__/__/____], received [__/__/____].
  2. Timeliness. This Notice is filed within ninety-one (91) days of receipt of the Final Decision and is timely under Idaho Code § 63-3049.
  3. Tax Type and Period. [______]; [__/__/____] – [__/__/____].
  4. Amount in Controversy. Tax $[__________] / Penalty $[__________] / Interest $[__________] / Total $[__________].
  5. BTA Jurisdiction. [☐ Individual income tax; ☐ corporate income / sales / use tax with an amount asserted of $25,000 or less; ☐ other tax with authority for BTA review].
  6. Security. Before filing this appeal, Appellant provided the Tax Commission a 20% cash deposit or other acceptable security in the amount of $[__________]. Proof is attached.

  7. Statement of Issues.
    a. [____________________________]
    b. [____________________________]
    c. [____________________________]

  8. Relief Requested. Reversal of the Final Decision; redetermination of tax liability at $[__________]; abatement of penalty under § 63-3046(b); such other relief as is just.

  9. Election. Appellant elects the Board of Tax Appeals over district court under § 63-3049.

Filing fee: The BTA currently states there is no filing fee; confirm the current form.

Respectfully,

[________________________________]
[Counsel Name], ID Bar No. [____________]
[Firm], [Address], [Phone], [Email]

Certificate of Service: A copy of this Notice has been served on the Idaho State Tax Commission, P.O. Box 36, Boise, ID 83722-0410, by certified mail on [__/__/____].

C-2. Petition for Judicial Review — District Court (Alternative to BTA)

IN THE DISTRICT COURT OF THE [______] JUDICIAL DISTRICT
STATE OF IDAHO, IN AND FOR THE COUNTY OF [______]

Party Role
[TAXPAYER NAME], Petitioner
v.
IDAHO STATE TAX COMMISSION, Respondent

Case No. [TO BE ASSIGNED]

PETITION FOR JUDICIAL REVIEW / COMPLAINT
(Idaho Code § 63-3049)

Petitioner [NAME], pursuant to Idaho Code § 63-3049, petitions this Court for review of the Final Decision of the State Tax Commission and states:

  1. Parties / Venue. Petitioner [resides / has its principal place of business] in [_______] County, Idaho; venue is proper under § 63-3049.
  2. Decision Appealed From. Final Decision of the State Tax Commission dated [__/__/____], received [__/__/____].
  3. Timeliness. This Petition is filed within 91 days of receipt of the Final Decision and is timely under § 63-3049.
  4. Deficiency Deposit / Security. Before filing this Petition, Petitioner [☐ deposited with the State Tax Commission 20% of the amount asserted ($[__________]) under Idaho Code § 63-3049; ☐ provided other security acceptable to the Tax Commission in the form of [_______]].
  5. Administrative History. [Briefly state.]
  6. Issues on Review. [State each issue.]
  7. Relief Requested. Reversal; redetermination at $[__________]; refund of overpaid amounts; costs; such other relief as is just.

Dated: [__/__/____]

[________________________________]
[Counsel Name], ID Bar No. [____________]

Certificate of Service: Served on Idaho State Tax Commission and Idaho Attorney General by certified mail on [__/__/____].

Part D — Pre-Filing Checklist

Critical Deadlines

☐ 63-day protest deadline from NODD mailing (Idaho Code § 63-3045(1)(a)).
☐ 30-day protest deadline if NODD is for: ☐ IFTA audit ☐ IRP audit ☐ Idaho Full Fee Registration audit ☐ Sales-Tax Jeopardy Assessment.
☐ 28-day perfection cure if ITC sends incomplete-protest letter (IDAPA 35.02.01.320).
☐ 91-day appeal deadline to BTA or district court from receipt of Final Decision (§ 63-3049).
☐ Current income-tax deficiency-notice period under § 63-3068: generally 3 years, with the statute's special and unlimited-period provisions checked separately.
☐ 3-year refund-claim window (§ 63-3072).

Protest Content (IDAPA 35.02.01.320.01)

☐ Taxpayer name, address, tax ID (SSN/EIN/Idaho permit/ITIN).
☐ Tax period(s) identified.
☐ Each specific item disagreed with stated separately.
☐ Factual basis and legal basis for each objection (both required).
☐ Power of Attorney for any representative.
☐ Indexed exhibits.

Filing

☐ Mail to ITC Appeals Unit, P.O. Box 36, Boise, ID 83722-0410 via Certified Mail, Return Receipt Requested. Postmark controls.
☐ Save USPS Form 3811 and tracking number in matter file.

Appeals-Unit Stage

☐ Respond to hearing-rights letter within stated deadline (typically 42 days).
☐ Decide: ☐ informal hearing in person ☐ informal hearing by phone ☐ written decision in lieu of hearing.
☐ Submit additional documents prior to hearing.
☐ Request settlement in writing where facts/law support resolution.

Forum Election (Post-Final Decision)

☐ Evaluate BTA vs. district court (§ 63-3049):

  • BTA: available only when the tax and amount asserted fall within its jurisdiction; no filing fee under the current BTA form; 20% security still required.
  • District Court: available under § 63-3049 in the authorized county; 20% security required.
    ☐ Before either filing, provide the Tax Commission a 20% cash deposit or acceptable substitute security and retain proof (§ 63-3049(b)).
    ☐ Calendar onward appeal from BTA under § 63-3812 and current Idaho R. Civ. P. 84 (ordinarily 28 days after the BTA action is ripe for review).
    ☐ Calendar appeal from district court: to Idaho Supreme Court under Idaho Appellate Rule 14 (generally 42 days).

Property Tax (Separate Track — Not Covered by This Template)

☐ Property tax assessments: County Board of Equalization → BTA → district court (Idaho Code §§ 63-501 et seq.). Different deadlines apply.

Sources and References

  • Idaho Code § 63-3045 (NODD; 63-day protest) — https://legislature.idaho.gov/statutesrules/idstat/Title63/T63CH30/SECT63-3045/
  • ITC "Your Right to Appeal a Notice of Deficiency Determination" — https://tax.idaho.gov/online-services/compliance-audits/your-right-to-appeal-a-notice-of-deficiency-determination/
  • ITC Taxpayer Rights — https://tax.idaho.gov/taxpayer-rights/
  • Idaho Code § 63-3049 (Appeals — BTA or district court; 91 days; deposit) — https://legislature.idaho.gov/statutesrules/idstat/Title63/T63CH30/SECT63-3049/
  • Idaho Code § 63-3068 (Limitation periods on assessment) — https://legislature.idaho.gov/statutesrules/idstat/Title63/T63CH30/SECT63-3068/
  • IDAPA 35.02.01 (ITC Administration and Enforcement Rules) — https://adminrules.idaho.gov/rules/current/35/350201.pdf
  • Idaho Board of Tax Appeals — https://bta.idaho.gov/
  • IDAPA 36.01.01 (BTA Rules) — https://adminrules.idaho.gov/rules/current/36/360101.pdf
  • Idaho R. Civ. P. 84 (Judicial Review of Agency Actions) — https://isc.idaho.gov/ircp84-new
  • ITC Power of Attorney form (POA-ID) — https://tax.idaho.gov/document-mngr/forms_BL375E/
  • Sample ITC Decision (Docket No. 1-508-676-608) — https://tax.idaho.gov/document-mngr/1-508-676-608/
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About This Template

Tax law covers the paperwork that documents income, deductions, disputes, and settlements with the IRS and state tax authorities. Protests, offers in compromise, installment agreement requests, and appeals each have their own forms, supporting documentation, and strict deadlines. Well-prepared tax correspondence is often the difference between a negotiated resolution and an enforcement action with levies, liens, or penalties.

Important Notice

This template is provided for informational purposes. It is not legal advice. We recommend having an attorney review any legal document before signing, especially for high-value or complex matters.

Last updated: July 2026

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