Colorado State Tax Audit Response and Information Document Request Reply

COLORADO STATE TAX AUDIT RESPONSE PACKAGE

TABLE OF CONTENTS

1. Engagement Header and Auditor Contact
2. Re: Line — Audit Identification
3. Introduction and Scope of Engagement
4. Designation of Representative; Rules of Engagement
5. Confidentiality and Protective Provisions
6. IDR Response — Itemized
7. Position Statement
8. Statute of Limitations and Waiver Considerations
9. Records Retention and Production Methodology
10. Home-Rule City Coordination (If Applicable)
11. Reservation of Rights and Privilege Log
12. Signature Block and Power of Attorney
13. Exhibits and Index
14. Colorado Practice Notes
15. Sources and References

1. ENGAGEMENT HEADER AND AUDITOR CONTACT

[LAW FIRM / TAXPAYER LETTERHEAD]

[DATE OF LETTER]

VIA EMAIL AND CERTIFIED MAIL — RETURN RECEIPT REQUESTED

[AUDITOR NAME]

Colorado Department of Revenue

[Income Tax Audit Section / Sales Tax Audit Section / Field Audit Office]

[ADDRESS]

Email: [AUDITOR EMAIL]

Phone: [AUDITOR PHONE]

2. RE: LINE — AUDIT IDENTIFICATION

3. INTRODUCTION AND SCOPE OF ENGAGEMENT

3.1. This letter responds to the Department of Revenue's audit engagement letter dated [DATE] and the Information Document Request(s) ("IDR") referenced above. [TAXPAYER NAME] ("Taxpayer") cooperates fully with the audit and reserves all rights, defenses, and privileges available under Colorado and federal law.

3.2. The undersigned has been retained as Taxpayer's authorized representative pursuant to Colorado Form DR 0145 (Tax Information Designation and Power of Attorney), a copy of which is enclosed as Exhibit [A]. All communications regarding this audit should be directed to undersigned counsel.

3.3. This response is submitted in good faith and without waiver of any defense, including statute of limitations, attorney-client privilege, work-product protection, federally-authorized tax-practitioner privilege under IRC § 7525 (to the extent applicable to corresponding state matters), or constitutional protections.

4. DESIGNATION OF REPRESENTATIVE; RULES OF ENGAGEMENT

4.1. Single point of contact. All Department correspondence, document requests, and inquiries shall be directed to undersigned counsel at the address and email above. Direct contact with Taxpayer's officers, employees, or accounting personnel without counsel's presence or written consent is respectfully declined.

4.2. Interviews and field visits. Taxpayer will make personnel and facilities available for interviews and walk-throughs by mutual scheduling, with counsel present. Field-visit dates and topics should be requested at least ten (10) business days in advance.

4.3. Written communications preferred. To preserve a complete record, Taxpayer requests that material audit positions, adjustments, and IDRs be communicated in writing.

4.4. Document production format. Documents will be produced in [Bates-stamped PDF / native electronic format / encrypted secure file transfer] via [CDOR's secure file transfer / SecureFile / encrypted email]. Privileged materials will be logged rather than produced.

5. CONFIDENTIALITY AND PROTECTIVE PROVISIONS

5.1. Statutory confidentiality. Taxpayer's returns, supporting workpapers, and audit communications are confidential under C.R.S. § 39-21-113. The Department, its employees, and its agents may not disclose return information except as authorized by statute.

5.2. Sensitive personal information. Where IDRs implicate personally identifiable information of employees, customers, or beneficial owners, Taxpayer will redact non-essential PII and produce only information reasonably necessary to the audit issue.

5.3. Trade secrets and commercial information. Taxpayer asserts trade-secret protection over [describe categories — pricing models, customer lists, proprietary algorithms]. Taxpayer requests confirmation that such materials will be marked confidential and segregated within the audit file.

6. IDR RESPONSE — ITEMIZED

The following items respond to IDR No. [IDR-#] dated [DATE]. Each request is reproduced verbatim followed by the response.

6.1. Item 1 — [Quote IDR Item 1]

Response: [State response. Reference produced documents by Bates range and Exhibit number.]

Documents produced: Exhibit [__], Bates [CO-AUDIT-000001 — 000XXX].

6.2. Item 2 — [Quote IDR Item 2]

Response: [Response.]

Documents produced: Exhibit [__].

6.3. Item 3 — [Quote IDR Item 3]

Response — Objection in part. Taxpayer objects to this item to the extent it (i) calls for production of attorney-client privileged communications, (ii) seeks materials outside the audit periods, or (iii) is unduly burdensome. Subject to and without waiving these objections, Taxpayer produces the following non-privileged, in-scope materials.

Documents produced: Exhibit [__].

Privilege log: Exhibit [__].

6.4. Items Requiring Additional Time

Taxpayer requires additional time to compile responses to Items [__, __] because [reason — third-party records, legacy archives, system migration]. Taxpayer respectfully requests an extension to [DATE]. Confirmation of the extension is requested in writing.

7. POSITION STATEMENT

7.1. Issue 1 — [Describe Issue, e.g., Sourcing of Receipts under § 39-22-303.6]

Department's tentative position: [Summarize.]

Taxpayer's position: [State position with statutory citation, regulation, FYI publication, and case law.]

Supporting authority:

• C.R.S. § [XX-XX-XXX];
• 1 CCR 201-2, Reg. [XX];
• Department FYI / GIL [#];
• [Case citation].

Documentation: Exhibit [__].

7.2. Issue 2 — [Describe]

[Repeat structure.]

7.3. Penalty Defense

To the extent any adjustment is sustained, Taxpayer asserts reasonable cause and good-faith reliance defenses to the negligence and substantial-understatement penalties under C.R.S. §§ 39-22-621 and 39-21-116.5. Taxpayer relied on [qualified tax professional / published Department guidance / substantial authority].

8. STATUTE OF LIMITATIONS AND WAIVER CONSIDERATIONS

8.1. Standard limitations period. Under C.R.S. § 39-21-107, assessment of additional tax is generally barred after [four (4) years for income tax tied to federal period plus one year / three (3) years for sales/use tax] from the later of the return due date or filing date.

8.2. Federal RAR linkage. Where federal taxable income is adjusted by the IRS, Colorado limitations may be extended for one (1) year after the federal final determination if Taxpayer reports the change under C.R.S. § 39-22-601(6). Taxpayer [has reported / will report / has no federal RAR].

8.3. Waiver evaluation. Taxpayer [declines to extend the limitations period at this time / will consider a limited Form DR 1102 waiver upon receiving the Department's draft audit adjustments and identification of issues]. Any waiver Taxpayer signs will be limited in scope to identified issues and a defined extended period.

8.4. Fraud and false-return periods. Taxpayer disputes any assertion that a fraud or false-return exception applies. The unlimited assessment period under § 39-21-107(2)(c) is reserved for cases of intent to evade, which is not present here.

9. RECORDS RETENTION AND PRODUCTION METHODOLOGY

9.1. Retention policy. Taxpayer maintains a written records-retention policy consistent with C.R.S. § 39-26-116 (sales tax records — minimum three years) and § 39-22-601 (income tax records — period of assessment limitations).

9.2. Records available. For the audit periods, Taxpayer maintains the following records: [general ledger, sub-ledgers, sales journals, exemption certificates, federal returns, workpapers, contracts].

9.3. Sampling. Where the universe of transactions is large, Taxpayer is willing to discuss statistically valid sampling methodology consistent with the Department's published sampling guidance. Any sampling agreement should be reduced to writing and approved by both parties before execution.

9.4. Electronic records. Records are maintained in [ERP system — e.g., NetSuite, SAP, QuickBooks]. Taxpayer will provide read-only extracts in [Excel / CSV / SQL backup] format.

9.5. Records gaps. Taxpayer notes the following gaps and the basis: [describe — pre-conversion legacy data, third-party loss, retention-period expiration].

10. HOME-RULE CITY COORDINATION (IF APPLICABLE)

10.1. Home-rule jurisdiction. This audit is conducted by [CITY NAME], a home-rule municipality with self-administered sales and use tax authority under Colo. Const. Art. XX and C.R.S. § 29-2-106. The audit is governed by [City Code chapter / municipal ordinance], not by C.R.S. Title 39, Article 26.

10.2. Independent of CDOR. Findings, concessions, settlements, or determinations by the Colorado Department of Revenue have no binding effect on [CITY], and vice versa. Statutes of limitation, exemption definitions, and administrative procedures are governed exclusively by [CITY's] municipal code.

10.3. Parallel proceedings. [Where parallel CDOR audit exists] Taxpayer is also subject to a CDOR audit of the same underlying transactions for the period [__]. Taxpayer will coordinate consistent factual responses but reserves the right to assert different legal positions where municipal and state codes diverge.

10.4. Hearing track. Any protest of an assessment by [CITY] must be filed pursuant to [municipal code section] within [__] days. Appeal rights run to [the City's hearing officer / municipal court / district court via C.R.S. § 29-2-106.1 alternative dispute resolution].

11. RESERVATION OF RIGHTS AND PRIVILEGE LOG

11.1. Reservation. Nothing in this response, or in any document produced herewith, constitutes a waiver of (i) any defense, including statute of limitations and constitutional defenses; (ii) attorney-client privilege; (iii) work-product protection; (iv) the federally authorized tax-practitioner privilege under IRC § 7525 to the extent applicable; or (v) any other applicable privilege or protection.

11.2. Privilege log. Documents withheld on privilege grounds are identified on the privilege log at Exhibit [__], including author, recipient, date, subject (general), and basis for withholding.

11.3. Inadvertent disclosure. Inadvertent production of privileged material does not waive privilege. Taxpayer requests prompt return or destruction of any inadvertently produced privileged materials and reservation of clawback rights consistent with Colo. RPC 4.4(b).

11.4. Continuing duty. Taxpayer reserves the right to supplement and correct this response as additional documents or information become available.

12. SIGNATURE BLOCK AND POWER OF ATTORNEY

Respectfully submitted,

[________________________________]

[ATTORNEY / CPA NAME]

Colorado Bar No. [####]

[FIRM NAME]

[ADDRESS]

Telephone: [NUMBER] Email: [EMAIL]

Authorized Representative for [TAXPAYER NAME]

☐ Form DR 0145 Power of Attorney attached as Exhibit A

Date: [__/__/____]

13. EXHIBITS AND INDEX

14. COLORADO PRACTICE NOTES

• Home-rule city complexity is the defining feature of Colorado tax practice. Approximately seventy (70) Colorado municipalities self-administer their own sales and use tax under Colo. Const. Art. XX and C.R.S. § 29-2-106. A multi-state seller doing business in Colorado may face audits from CDOR plus several home-rule cities simultaneously, each applying different definitions of "tangible personal property," "service," "use," nexus, exemption documentation, and limitations periods. The Department of Revenue's DR 1002 publication lists state-collected versus self-collected jurisdictions and is updated semi-annually.
• CDOR audit selection. Common triggers include federal RAR audits, large refund claims, sales-tax remittance variance, late-filed returns, related-party transactions, and apportionment outliers. Income-tax audits are typically handled out of the Income Tax Audit Section; sales/use audits from regional field offices.
• Information Document Requests. The Department uses both formal IDRs and informal email requests. Treat all written requests as discovery and respond in writing through counsel. Maintain a master IDR log noting receipt date, response date, and Bates range.
• Records retention. C.R.S. § 39-26-116 requires three (3) years of sales-tax records minimum; income-tax records should be retained at least four (4) years (state limitations period generally runs federal-plus-one). Where a federal RAR is open or a refund claim is pending, extend retention until both periods close.
• Statute waivers (Form DR 1102 / written extension). Decline blanket waivers. Any waiver should (i) be limited to identified issues, (ii) be limited in time to a date certain, and (iii) be revocable on 60 days' written notice. Calendar all extension dates.
• Sampling. CDOR routinely uses block or stratified sampling on sales-tax audits. Sampling methodology should be agreed in writing before extrapolation; preserve the right to challenge projection methodology in protest.
• Confidentiality. C.R.S. § 39-21-113 protects taxpayer return information. Mark sensitive submissions and request that the auditor confirm storage and access protocols.
• Coordinating with parallel home-rule audits. Maintain a single fact pattern across all jurisdictions but tailor legal positions to each municipal code. Settlements with one jurisdiction are not binding on others; obtain confidential treatment if available.
• Penalty mitigation. Reasonable-cause penalty abatement is available throughout the audit and protest cycle. Document contemporaneously: tax-advisor opinions, reliance memoranda, internal compliance reviews.
• Auditor escalation. If informal resolution stalls, request a manager conference before the Notice of Deficiency issues. Once the Notice issues, the file moves to the Tax Conferee and then the Hearings Division.

15. SOURCES AND REFERENCES

• C.R.S. Title 39, Article 21 (Procedure and Administration) — https://leg.colorado.gov/colorado-revised-statutes
• C.R.S. § 39-21-107 (Limitations on assessment) — https://law.justia.com/codes/colorado/title-39/specific-taxes/general-and-administrative/article-21/part-1/section-39-21-107/
• C.R.S. § 39-21-112 (Powers of the Executive Director) — https://law.justia.com/codes/colorado/title-39/
• C.R.S. § 39-21-113 (Confidentiality) — https://law.justia.com/codes/colorado/title-39/
• C.R.S. § 39-22-601 (Returns and RAR reporting) — https://law.justia.com/codes/colorado/title-39/
• C.R.S. § 39-26-116 (Sales tax record retention) — https://law.justia.com/codes/colorado/title-39/
• C.R.S. § 29-2-106 (Home-rule sales/use tax authority) — https://law.justia.com/codes/colorado/title-29/
• Colo. Const. Art. XX (Home Rule for Cities and Towns) — https://leg.colorado.gov/
• Colorado Department of Revenue — Audit Information — https://tax.colorado.gov/
• Colorado Department of Revenue — DR 1002 (Sales/Use Tax Rates and Self-Administered Cities) — https://tax.colorado.gov/DR1002
• Colorado Department of Revenue — Local Government Sales Tax — https://tax.colorado.gov/local-government-sales-tax
• Colorado Department of Revenue — Form DR 0145 — https://tax.colorado.gov/individual-income-tax-forms
• Colorado Department of Revenue — File a Protest — https://tax.colorado.gov/file-a-protest
• 1 CCR 201-1 (Procedure and Administration) — https://www.sos.state.co.us/CCR/

Disclaimer: This template is provided for informational purposes only and does not constitute legal advice. An attorney or qualified tax professional licensed in Colorado must review and customize this document before submission. Statutes, regulations, and Department procedures change frequently; verify all authorities and deadlines before use.