Legal & Compliance

Privacy &
AI Policy.

How we protect your financial data, what AI tools we use and why, and the standards we apply before any new system touches client information.

Last updated: June 24, 2026IRS Bulletin 2026-19 CompliantCircular 230 · IRC §7216

Part I

Privacy Policy

Trailhead Tax (formerly C&A Welch Inc.) is a federally licensed tax firm operating in Folsom, California. This Privacy Policy describes how we collect, use, store, and protect personal and financial information provided to us by clients, prospective clients, and website visitors.

As Enrolled Agents and tax practitioners, we are subject to the privacy and confidentiality requirements of Internal Revenue Code §§ 6713 and 7216, Treasury Regulation § 301.7216-2, and Circular 230. This policy is designed to be consistent with those requirements.

What We Collect

We collect information necessary to provide tax preparation, bookkeeping, and advisory services. This includes:

  • Identity information: full name, date of birth, Social Security Number or ITIN, government-issued ID
  • Financial information: income statements (W-2, 1099, K-1), bank and investment account records, business financial statements, QuickBooks or other accounting data
  • Contact information: email address, phone number, mailing address
  • Business information: entity type, EIN, ownership structure, state registrations, officer information
  • Prior-year tax returns and supporting documentation
  • Communications: emails, messages, and call notes related to your engagement
  • Website usage data: IP address, browser type, pages visited, and referral source via standard web analytics

How We Use Your Information

We use your information exclusively to:

  • Prepare, review, and file federal and state tax returns on your behalf
  • Provide bookkeeping, advisory, and financial planning services as engaged
  • Communicate with you regarding your engagement, deliverables, and deadlines
  • Comply with IRS, state tax authority, and regulatory requirements
  • Maintain our internal records and practice management systems
  • Send engagement-related documents, proposals, and invoices
  • Improve our internal workflows and quality controls
We do not sell, rent, or trade your personal or financial information. We do not use your information for marketing purposes without your explicit consent. We do not use client data to train artificial intelligence models.

Data Sharing & Disclosure

We disclose client information only as permitted or required by IRC § 7216 and Circular 230 § 10.51. Specifically, we may share your information:

  • With the IRS, state tax authorities, or other agencies as required to file returns or respond to notices on your behalf
  • With third-party service providers directly supporting your engagement — including our practice management platform (TaxDome), proposal software (Ignition), and bookkeeping platform (QuickBooks Online) — who are contractually bound to protect your information
  • With successor practitioners or firms if our practice is sold or transferred, with prior written consent
  • As required by law, court order, or regulatory authority
  • With your explicit written consent for any other purpose
IRC § 7216 Notice: Federal law requires us to obtain your consent before disclosing your tax return information to any third party not listed above. Any such consent will be in writing and specific to the disclosed information and recipient. Unauthorized disclosure carries civil penalties of up to $1,000 per violation and potential criminal prosecution.

Data Retention

We retain client records in accordance with IRS recordkeeping requirements and California state law. Tax return information is retained for a minimum of seven (7) years from the date of filing. Electronic records are stored in encrypted, access-controlled systems. Physical documents are stored securely and destroyed using certified methods when retention periods expire.

Your Rights

You have the right to:

  • Request a copy of the personal information we hold about you
  • Request correction of inaccurate information
  • Request deletion of your information, subject to our legal retention obligations
  • Withdraw consent for any discretionary use of your information
  • File a complaint with the IRS Office of Professional Responsibility or applicable state authority if you believe your information has been improperly disclosed

To exercise any of these rights, contact us at clay@mytrailhead.tax.

Part II

AI Use Policy

Trailhead Tax uses artificial intelligence tools to improve the efficiency, accuracy, and quality of our work. This policy describes which tools we use, how we handle client data in AI contexts, and the standards we apply when evaluating and adopting new technology — in compliance with Circular 230 and IRS Bulletin 2026-19 (Office of Professional Responsibility, June 24, 2026).

Core Commitment

AI at Trailhead Tax is a tool that augments professional judgment — it does not replace it. Every AI-assisted work product is reviewed, verified, and approved by a qualified practitioner before delivery to clients or submission to any tax authority. Final responsibility for accuracy and advice rests with our credentialed professionals, not with any AI system.

AI Tools We Use

Our current AI tools were each deliberately selected because they operate under policies that prohibit using customer data to train their models. We use:

Claude (Anthropic)

Accessed via our Claude Team account and the Anthropic API. Anthropic's usage policies explicitly prohibit using API inputs to train their models.

Gemini (Google)

Accessed exclusively through our Google Workspace subscription. Google Workspace's data processing terms prohibit using Workspace data to train Google AI models.

Workflow automation layer

Practice intelligence tools integrated into our n8n automation platform for internal task routing, scheduling, and status monitoring.

We do not use general-purpose free-tier consumer AI products for any work involving client financial data. Every AI tool that may touch client data must pass our vendor evaluation process before it is approved for use.

Client Data & AI Systems

Critical Data Handling Rule — No Exceptions

Client tax return information, Social Security Numbers, EINs, financial account data, and any other information subject to IRC §§ 6713 and 7216 is transmitted only through AI providers whose data policies contractually prohibit using inputs for model training. Client data is never entered into consumer AI chatbots, free-tier AI tools, or any system where data handling cannot be contractually verified.

Our AI infrastructure is designed with the following data protections:

  • AI calls involving client data route only through approved providers (Anthropic API, Google Workspace) — both contractually prohibit using inputs for model training
  • No client data is routed through third-party API aggregators, model routers, or middleware that would introduce additional data handlers
  • Client data processed by AI is stored in our own infrastructure, not in AI provider systems
  • Access to AI-processed client records is limited to credentialed practitioners and authorized staff
  • AI systems receive only the minimum data necessary to complete a specific task

Technology Vendor Evaluation Standards

Trailhead Tax continuously evaluates and adopts new systems — practice management tools, AI assistants, automation platforms, document processing services, and client-facing software. Because our work involves highly sensitive financial and tax data, every new system goes through a formal vetting process before client data is ever permitted to touch it.

Our evaluation criteria include:

SOC 2 Type II Compliance

We require evidence of independent third-party audit confirming the vendor's security controls over time, not just point-in-time certification.

Explicit No-Training Policy

Any system that may process client PII must have a clear, contractually enforceable policy prohibiting the use of customer data to train AI or machine learning models.

Data Residency & Processing Agreements

We verify where data is stored, who has access, and whether subprocessors are disclosed and bound by equivalent standards.

IRC § 7216 Compatibility

Any vendor receiving tax return information must be structured as a permissible recipient under Treasury Regulation § 301.7216-2 or require client consent.

Security Architecture Review

We assess encryption standards, access controls, incident response posture, and breach notification commitments before adoption.

Annual Re-Evaluation

Vendor certifications and policies are reviewed at least annually. Any material change to a vendor's data practices triggers an immediate re-evaluation.

New systems do not touch client data until this review is complete. Staff may not route client information through any tool or platform that has not been evaluated and approved, regardless of convenience or cost savings. When in doubt, the answer is no until the review is done.

Human Review Requirement

No AI output becomes a client deliverable, filed document, or formal recommendation without explicit review and approval by a credentialed practitioner. This applies to:

  • Tax return data, calculations, or supporting schedules
  • Written tax advice or planning recommendations
  • Client-facing communications generated or drafted by AI
  • Document summaries or data extractions used in return preparation
  • Automated insights surfaced through our client portal

AI-assisted actions that affect client engagements (such as proposal generation or advisory summaries) are held in draft state until reviewed and explicitly approved by Clay Welch, EA. Automated actions are never taken on a client's behalf without practitioner authorization.

Staff Training & Governance

All staff with access to AI tools and client data receive training covering:

  • This AI Use Policy and the Circular 230 provisions it implements
  • The prohibition on entering client data into unapproved AI systems
  • How to identify and escalate AI-generated errors or hallucinations
  • The review and approval workflow for AI-assisted deliverables
  • IRC § 7216 data disclosure obligations

This policy is reviewed and updated at least annually, or whenever a new AI tool is adopted, applicable IRS guidance is issued, or a material change in our AI infrastructure occurs. The current version is always published at mytrailhead.tax/privacy.

Questions

Contact Us

If you have questions about this Privacy Policy or AI Use Policy, believe your information has been handled incorrectly, or wish to exercise your data rights, contact us:

Trailhead Tax

101 Parkshore Dr Suite 100, Folsom, CA 95630

(916) 941-5286

clay@mytrailhead.tax

Circular 230 complaints may be directed to the IRS Office of Professional Responsibility at irs.gov/tax-professionals/office-of-professional-responsibility.

© 2026 Trailhead Tax. Last updated June 24, 2026. This policy is reviewed annually and updated when material changes occur.