Scope
Define precisely which tax returns, years, or advisory services are included and what is expressly excluded.
A well-drafted Tax Engagement Letter clarifies responsibilities, outlines fees and billing, sets delivery timelines, and limits exposure by identifying exclusions and reliance on client-provided data.
Tax Engagement Letters are used by individual filers, small businesses, and professional firms to document tax engagements and expectations.
Clear segmentation helps writers tailor scope, fee terms, and signature requirements to the recipient’s needs and regulatory context.
Define precisely which tax returns, years, or advisory services are included and what is expressly excluded.
List documents the client must provide, representations about accuracy, and deadlines for information delivery.
Describe fee basis, estimates, billing intervals, retainer requirements, and consequences for late payment.
Specify final deliverables such as signed tax returns, workpapers, or planning memos and how they will be delivered.
State liability limits, reliance disclaimers, and any cap on remedial damages or indemnities.
Explain how either party may end the engagement and obligations that survive termination, such as confidentiality and record retention.
| Field | Configuration |
|---|---|
| Signature Field | Require signer name and date |
| Authentication | Email link or SMS code |
| Routing | Signer order and reminders |
| Retention | Automatic archive and audit trail |
Choose a platform that supports audit trails, common file formats, and the authentication needed for your risk profile.
Provide the letter before preparer begins substantive work.
Recipient and IRS deadlines: Jan 31 each year
Form 1040 due April 15 (extension to Oct 15)
Provide upon payer request; no fixed federal deadline
Retention periods start from filing or creation
Agreement executed and effective date recorded.
Client provides required documents and tax data.
Return prepared and internal review performed.
Final return delivered; e-file or paper filing initiated.
Save final documents as PDF/A and also retain a native DOCX draft for edit history and internal use.
Capture an audit trail file showing signer identity, timestamps, and IP addresses to support authenticity.
Retain prior drafts and change logs to document negotiations or revisions over time.
Include W-2s, 1099s, engagement schedules, and authorization letters as labeled exhibits to the letter.
Optica standardized engagement letters for client onboarding to reduce timing gaps.
A healthcare provider moved to signed electronic agreements for administrative forms and consents.
| 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 plan | Varies by plan | Varies by plan | Varies by plan |
| Bulk Send | Yes | Yes | Yes | Yes | Varies |
| Audit Trail | Yes | Yes | Yes | Yes | Yes |
| HIPAA Compliant | Yes (BAA) | Yes (BAA) | Yes (BAA) | Varies | Varies |