Can the engagement letter be signed electronically?

Yes. Electronic signatures are legally enforceable under the ESIGN Act (15 U.S.C. ch. 96) and UETA in most states, provided intent, consent, attribution, and record retention are satisfied.

Is notarization or witness required?

Generally not required for engagement letters; however, state variations and specific exhibits (e.g., POA in some states) may require notarization or witnesses—check state rules before execution.

Who can sign for a business client?

An authorized officer or individual with corporate authority should sign. The letter should identify signer capacity (owner, CEO, CFO) to avoid later disputes about authority.

How do I revoke or amend the engagement?

Follow the termination and amendment clauses in the letter. For amendments, use a dated written addendum signed by both parties to document changes.

How long should I keep executed engagement letters?

Retain for at least three years after the engagement and longer when tax issues, litigation, or regulatory obligations apply; see IRC §6501(a) and relevant industry rules.

What if the IRS requests the practitioner’s file?

Respond with counsel. Production may implicate privilege and confidentiality; only disclose what is required and consult legal counsel before voluntary production.

Electronic Signature
Templates
Tax
Tax Defense Engagement Letter

Tax Defense Engagement Letter

This template is fully customizable. Edit the text, fill out the fields, and send it for signature. Give it a try!

Tax Defense Engagement Letter

This Engagement Letter is made effective as of between:

Parties

Client Name Client Business Name (if applicable) Tax Firm Name

Scope of Engagement

The Firm will provide tax controversy and defense services limited to the matters expressly described below. Services do not include tax return preparation, unrelated tax planning, or litigation beyond administrative appeals unless specifically agreed in writing.

Description of Matter(s) to be Defended

Firm Responsibilities

The Firm will: (a) advise Client concerning the specified tax controversy; (b) communicate with taxing authorities and opposing counsel as authorized; (c) prepare and file necessary pleadings and responses within the scope of this engagement; and (d) keep Client reasonably informed of material developments. The Firm will exercise reasonable professional judgment but makes no guarantee as to the outcome of any matter.

Client Responsibilities

The Client must cooperate fully, provide truthful and complete information and documentation in a timely manner, and forward all notices, demands, and correspondence from taxing authorities to the Firm immediately. Client acknowledges that the Firm’s ability to represent Client effectively depends on Client’s cooperation.

Client Obligations / Special Instructions

Fees, Retainer and Billing

Fees are based on time expended at the Firm’s standard hourly rates plus out-of-pocket costs. The Firm will bill monthly unless otherwise agreed. Payment is due upon receipt.

Hourly Rate (primary attorney) Retainer Amount Retainer Due Date Billing Contact Name Billing Contact Email

Taxpayer Identification

Taxpayer Full Legal Name Taxpayer Business Name (if any)

Entity Type (check all that apply):

Individual / Sole Proprietor C Corporation S Corporation Partnership Trust / Estate LLC Other (specify below) If Other, Describe

Taxpayer Identification Number (provide one):

Social Security Number (SSN) Employer Identification Number (EIN)

Authorization and Scope of Representation

Client authorizes the Firm to represent Client before federal, state and local tax authorities and to receive and review confidential taxpayer information as necessary to perform the limited engagement described herein. This authorization includes the ability to:

Receive and respond to notices and correspondence Negotiate settlements and payment plans Execute administrative forms and authorizations on Client’s behalf as necessary within the scope of this engagement Additional Authorizations / Restrictions

Confidentiality and Privilege

All communications by Client to the Firm for the purpose of obtaining tax advice in the course of this engagement are intended to be privileged or protected from disclosure to the extent permitted by law. The Firm will use reasonable measures to maintain confidentiality, but Client understands privilege may be waived by disclosure to third parties or by order of a tribunal.

Limitation of Engagement

Unless otherwise agreed in writing, the Firm will not represent Client in litigation in court, criminal defense, or in matters unrelated to the specific tax controversy described above. Any additional matters require a new written engagement agreement.

Termination and Governing Law

Either party may terminate this engagement upon written notice. Client remains responsible for fees and costs reasonably incurred prior to termination. This engagement shall be governed by the laws of the state identified below.

Governing State

Certification and Client Acknowledgments

By signing below, Client certifies and acknowledges the following statements under penalty of perjury where applicable. Please check each box to indicate agreement and understanding.

1. The taxpayer identification number provided above is true, correct and complete to the best of Client's knowledge, and Client will notify the Firm promptly of any changes. 2. Client has provided all material facts and documents known to Client that are relevant to the representation and understands that omission or misrepresentation may impair the Firm’s ability to represent Client. 3. Client authorizes the Firm to discuss Client's tax matters with designated third parties and to obtain relevant records necessary to represent Client. 4. Client understands that the Firm cannot guarantee a particular result and that the Firm’s advice is based on the facts and law provided at the time of representation.

Acknowledgment of Receipt

Please sign below to acknowledge acceptance of the terms of this Engagement Letter. Signing indicates Client’s agreement to the scope, fees, and terms set forth herein.

Client:

By:

Date:

Tax Firm (Authorized Representative):

By:

Date:

What a Tax Defense Engagement Letter Is and When It’s Used

A Tax Defense Engagement Letter is a written agreement between a taxpayer and a tax practitioner (attorney or enrolled agent) that defines the scope of representation, fees, responsibilities, and limits for defense against IRS or state tax examinations, collections, or penalty disputes. It documents who will act on the client’s behalf, which tax years and issues are covered, how communications are handled, billing arrangements, and termination terms. The letter helps manage expectations, creates an evidentiary record of the attorney-client or professional relationship, and identifies documents and authorizations required to proceed.

Why a Clear Engagement Letter Matters for Tax Defense

A clear engagement letter reduces misunderstandings about scope, fees, and authority, and establishes the terms for representation before a tax notice escalates. It creates a record that supports privilege and professional responsibility obligations when disputes arise.

Who Typically Uses a Tax Defense Engagement Letter

Engagement letters are used by tax attorneys, enrolled agents, CPAs, and taxpayers to formalize representation for audits, collections, appeals, and penalty abatement.

Tax attorneys representing clients in IRS or state audits or appeals, documenting legal scope and confidentiality.
Enrolled agents or CPAs providing audit defense or collection negotiations on behalf of individuals or businesses.
Individual or business taxpayers engaging professional representation and granting authority for communications with tax authorities.

A written letter helps preserve attorney-client privilege where applicable and clarifies who may sign consent forms or disclosure authorizations.

Typical Signatories and Roles

Tax Attorney

A licensed attorney who provides legal advice, represents the client before tax authorities, and signs pleadings or appeals. The engagement letter should state whether the relationship is attorney-client and note privilege and confidentiality limits.

Client / Taxpayer

The individual or business that engages the practitioner, provides documents and authorizations (e.g., Form 2848 or state equivalent), and agrees to fees, billing terms, and cooperation obligations required for effective representation.

Core Elements to Include in the Tax Defense Engagement Letter

Include specific, measurable items so both parties understand obligations, timeframes, billing, and authority. Cover privilege, document handling, and dispute resolution.

Scope

Define the precise tax years, returns, and issues covered (audit, collection, penalty abatement, appeals) and any excluded matters to prevent scope creep.

Authority

Specify who may act or sign on the client’s behalf (e.g., Form 2848 power of attorney) and whether the practitioner may disclose information to third parties.

Fees

Detail fee structure (hourly, flat, contingency), retainer amount, billing frequency, and consequences for nonpayment, including termination rights.

Confidentiality

State attorney-client privilege expectations and any exceptions, including required disclosures to tax authorities or court-ordered production.

Deliverables

List expected outputs such as submission of responses, appeals filings, negotiated settlements, or installment agreements with timelines.

Termination

Describe how either party may end representation, file transfer of files, final accounting, and any surviving obligations, such as unpaid fees.

Step-by-Step: How to Complete a Tax Defense Engagement Letter

Follow a clear sequence to prepare, approve, and execute the letter so representation can begin promptly and accurately.

01

Gather Documents: Collect returns, IRS notices, and prior correspondence relevant to the dispute.
02

Draft Scope: Define covered years, issues, and any exclusions in plain language.
03

Agree Fees: Confirm retainer, rates, and expense responsibilities in writing.
04

Execute Letter: Have authorized signer sign, date, and return the executed copy to the practitioner.

How to Configure an Online Engagement Workflow

Set up fields and routing so the letter, power of attorney, and supporting documents are collected and stored securely.

Field	Configuration
Signer Authentication	Email link \| optional SMS code
Required Attachments	Upload returns \| support PDFs
Conditional Fields	Show payment fields if retainer unpaid
Retention Setting	Set document retention policy and export format

Where to Send, File, and Store Executed Letters

Use secure delivery and retention practices to preserve confidentiality and ensure retrievability during an audit or appeal.

To the Practitioner: Return signed copy to the attorney and billing contact.
Tax Authority: Submit Form 2848 or authorization to IRS or state as required.
Client Records: Store executed letter in client file for at least retention period.
Third Parties: Provide copies to enrolled agents or co-counsel only with client consent.

Technical Considerations for eSigning and Secure Transmission

Choose platforms and settings that preserve chain-of-custody, provide audit trails, and meet any industry compliance obligations.

Authentication: Use at least email verification; consider SMS or ID checks.
File Formats: Prefer PDF/A for long-term storage.
Integrations: Link to document management or CRM systems.

Ensure the chosen system supports secure storage, exportable audit trails, and any required BAAs or compliance attestations.

Comparing eSignature Platforms for Executing a Tax Defense Engagement Letter

Common selection criteria include price, trial availability, bulk-send features, audit trail quality, and HIPAA support where health data may be present.

	signNow	DocuSign	Adobe Sign	PandaDoc	HelloSign
Starting Price	$8/user/mo	$15/user/mo	$14/user/mo	$19/user/mo	$15/user/mo
Free Trial	7-day free trial	No	No	No	No
Bulk Send	Yes	Yes	Yes	Yes	No
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes	Yes	Yes	No	No

Key Deadlines and Timeframes That Affect Tax Defense Work

Be aware of statutory filing deadlines and common internal response windows to preserve client rights and avoid default rulings.

Provide W-9 on Request:

No fixed deadline; deliver promptly to avoid backup withholding consequences.

1099-NEC Reporting:

Recipient and IRS due by January 31 each year.

Individual Tax Return:

Form 1040 due April 15 (Oct 15 extension with Form 4868).

FBAR Filing:

Due April 15 with automatic extension to October 15.

Statute of Limitations:

Generally three years for assessments under IRC §6501(a); longer in limited circumstances.

Security and Compliance Facts to Record in the File

Encryption in Transit: TLS 1.2/1.3

Encryption at Rest: AES-256

HIPAA Support: BAA required

Audit Trail: IP, timestamp, actions

ESIGN/UETA: Legal compliance

21 CFR Part 11: Available as needed

Penalties and Risks If an Engagement Letter or Related Filings Are Incorrect

Incorrect TIN: Backup withholding 24%

Late 1099 Filing: $60–$330 per form (IRC §6721)

Intentional Disregard: $660+ per form

I-9 Violations: $281–$2,789 per violation

Privilege Risk: Improper disclosures may waive privilege

Missing POA: Agency cannot communicate with authority

Common Preparation Mistakes to Avoid

Using an informal or oral agreement without written scope, which leads to disputes about covered work and fees.
Failing to obtain a signed power of attorney (Form 2848 or state equivalent), preventing the practitioner from interacting with the IRS on the client’s behalf.
Mismatching the client’s legal name or TIN between the engagement letter and tax returns, which can delay filings and trigger backup withholding.
Omitting explicit fee and expense allocation, resulting in billing disputes or surprise charges during representation.

Representative Use Cases for a Tax Defense Engagement Letter

Real-world scenarios illustrate how engagement letters structure representation, fees, and communications for tax disputes.

Individual Audit Representation

Client receives IRS audit notice and hires counsel to represent 2019–2021 returns

Practitioner files Form 2848 and negotiates deficiency
The letter specified flat-fee scope, document deliverables, and termination terms to avoid billing disputes during the audit process.

Business Collection Appeal

Small business faces levy for unpaid payroll taxes and engages an enrolled agent for collections case

Agent negotiates installment agreement and penalty abatement
Engagement letter defined authority for bank contact, outlined required financial statements, and allocated payment of third-party expert fees.

Practical Tips to Keep Engagement Letters Clear and Enforceable

Adopt clear language, confirm client identity, and record execution to minimize disputes and preserve protections.

Use Plain Language

Write scope and fee terms clearly to avoid differing interpretations later.

Capture Consent

Document client consent for electronic records per ESIGN requirements.

Attach Exhibits

Include list of required documents and exhibits referenced by the letter.

Record Execution

Keep a signed PDF with audit trail and signer metadata for evidentiary use.

Frequently Asked Questions About Tax Defense Engagement Letters

Answers to common questions about signing, authority, retention, and enforcement of engagement letters in tax defense matters.

Need help? Contact support

Can the engagement letter be signed electronically?
Yes. Electronic signatures are legally enforceable under the ESIGN Act (15 U.S.C. ch. 96) and UETA in most states, provided intent, consent, attribution, and record retention are satisfied.
Is notarization or witness required?
Generally not required for engagement letters; however, state variations and specific exhibits (e.g., POA in some states) may require notarization or witnesses—check state rules before execution.
Who can sign for a business client?
An authorized officer or individual with corporate authority should sign. The letter should identify signer capacity (owner, CEO, CFO) to avoid later disputes about authority.
How do I revoke or amend the engagement?
Follow the termination and amendment clauses in the letter. For amendments, use a dated written addendum signed by both parties to document changes.
How long should I keep executed engagement letters?
Retain for at least three years after the engagement and longer when tax issues, litigation, or regulatory obligations apply; see IRC §6501(a) and relevant industry rules.
What if the IRS requests the practitioner’s file?
Respond with counsel. Production may implicate privilege and confidentiality; only disclose what is required and consult legal counsel before voluntary production.

be ready to get more

Join over 28 million airSlate SignNow users

Sign Now