Scope of Services
Specify exactly which tax returns, periods, and advisory tasks are included and which services are excluded to avoid scope creep and fee disputes.
A concise Tax Services Engagement Letter establishes mutual expectations, limits professional liability, and documents consent for electronic delivery and signatures. It supports audit defense, clarifies fee arrangements, and creates an evidentiary record of the engagement and scope.
Engagement letters are used by firms and by individuals or entities that retain tax professionals; the signer mix depends on client type and firm structure.
Each party should keep an executed copy and update the letter when scope, fees, or engagement dates change.
A licensed CPA or tax partner signs on behalf of the firm to accept engagement terms, describe professional standards, and confirm fee structures. Their signature binds the firm and indicates responsibility for supervision and quality review.
An authorized individual (owner, officer, or named agent) signs for the client entity or individual taxpayer to confirm acceptance of scope, consent to electronic communications, and responsibility to provide accurate records and timely information.
Specify exactly which tax returns, periods, and advisory tasks are included and which services are excluded to avoid scope creep and fee disputes.
Describe billing method (hourly, flat, or contingency), payment terms, retainer requirements, and consequences for late payment or termination.
State the deliverables (signed returns, representations), internal deadlines for client-provided documents, and filing deadlines that the firm will meet or support.
List required records, representations about accuracy, and obligations to disclose material facts affecting tax positions and filings.
Include disclaimers, caps on damages where permitted, indemnity language, and any reliance limitations tied to professional standards.
Document consent to receive electronic records, the method of delivery, eSignature acceptance, and procedures to withdraw consent under ESIGN (15 U.S.C. §7001).
| Field | Configuration |
|---|---|
| Client Name Field | Required | validation for letters and numbers |
| Signature Field | Signer authentication required | timestamp enabled |
| Date Field | Automatic MM/DD/YYYY format | signer-supplied date option |
| Attachment Field | Allow upload of supporting documents (PDF) | optional |
Choose a platform that supports required authentication, audit trails, and retention practices for tax engagements.
Ensure the platform preserves a tamper-evident PDF and retains the audit record to support signature attribution and legal enforceability.
Provide upon payer request; obtain before payments to avoid backup withholding.
File and furnish by Jan 31 to avoid penalties for late reporting.
If issuing electronically, file by Mar 31 with IRS for many payees.
Standard filing deadline is April 15; Form 4868 extends filing to Oct 15.
Use agreed MM/DD/YYYY to determine service window and deadlines.
Contract executed and effective date recorded; authorizes preparer to act.
Client supplies records and TINs by the agreed internal cutoff.
Preparer drafts returns, performs review, and obtains client approval.
Returns filed and workpapers archived according to retention policy.
| Criteria | Tax Services Engagement Letter | General Accounting Engagement Letter |
|---|---|---|
| Primary Purpose | tax prep and representation | broad accounting or consulting services |
| Regulatory Focus | irs rules, tax deadlines | gaap, audit standards |
| Typical Deliverables | filed returns, client letters | financial statements, reports |
| eSignature Suitability | yes, with consent | yes, with consent |
| 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 | Varies by vendor | Varies by vendor | Varies by vendor | Varies by vendor |
| Bulk Send | Yes (Business Premium) | Yes | Yes | Yes | Varies by plan |
| Audit Trail | Yes | Yes | Yes | Yes | Yes |
| HIPAA Compliant | Yes (BAA available) | Yes (BAA available) | Yes (BAA available) | Varies | Varies |
| Envelope Cap | No cap | 100 envelopes/user/year limit | Varies | Varies | Varies |
The firm adopted a standardized engagement letter for recurring tax services to reduce turnaround times by documenting scope clearly.
A health-care related entity added a privacy addendum and BAA to a tax engagement letter to permit handling of limited PHI for payroll tax issues.