Coordinating Separate IRS and California FTB Audits

An IRS examination and a California Franchise Tax Board audit can involve the same year, transaction, or income item without becoming one proceeding. The agencies issue separate notices, request records under separate authority, calculate deadlines independently, and may reach results on different schedules. A response sent to one agency should not be assumed to satisfy the other.

The practical solution is a two-track audit file with a third reconciliation layer. Track each agency’s notices and submissions separately; then maintain a comparison that identifies which facts, return positions, and proposed adjustments overlap.

Open a separate control sheet for each agency

The IRS says an audit begins by mail and that its written request identifies the specific documents sought. California’s FTB audit page likewise says the agency contacts taxpayers in writing and that the letter can identify tax years, issues, requested information, and contact instructions. FTB may issue one or more Information Document Requests during an audit.

For each agency, record:

• notice date and date received;
• taxpayer or entity name and identifying tax year;
• notice or request number;
• issues under examination;
• examiner or unit contact information;
• stated response deadline;
• authorized delivery method;
• representative and authorization status;
• documents and explanation submitted;
• delivery confirmation; and
• next event, proposed adjustment, or challenge deadline.

Never merge deadlines just because the tax years match. Calendar the date printed on each notice and obtain advice about how it is computed. A request for more time from one agency has no automatic effect on the other.

Build a reconciliation layer for overlapping issues

Create a matrix with one row per issue—income item, deduction, credit, entity classification, residency fact, basis item, carryover, or other adjustment. Use columns for the federal return treatment, California return treatment, each agency’s request, source documents, conformity or state-law difference, response status, and potential downstream amendment or reporting question.

The same source document can appear in both agency productions, but the explanation may differ because federal and California law do not conform in every respect. Preserve an identical clean source copy, then maintain separate production copies and separate cover letters. Label agency-specific redactions or annotations. Do not let later edits to a working spreadsheet silently change the record of what was sent earlier.

FTB states that California audits can originate from several sources, including IRS information. That does not mean an IRS determination automatically decides every California issue. Conversely, an FTB request does not necessarily alter the federal examination. The governing return, adjustment, conformity rule, and procedural posture must be analyzed rather than assumed.

Track federal-adjustment reporting as its own deadline

The FTB audit page points to California Revenue and Taxation Code section 18622 and states that a taxpayer must notify FTB within six months of a federal adjustment. It also describes different California assessment periods depending on whether notice is timely, late, or never given. The exact event that constitutes a reportable federal change, the required form or submission, and how the rule applies to the taxpayer require current, case-specific review.

Add a separate federal-adjustment row to the calendar. Record when the federal determination became final or otherwise triggered the relevant reporting analysis, what changed, which California years or items may be affected, the filing or notice method used, and proof FTB received it. Do not wait for an FTB examiner to ask if a reporting duty may already be running.

Preserve the procedural posture on both sides

During an FTB audit, the agency says it will review deadlines and submitted documents and provide an opportunity to respond to its position before closing. Possible written outcomes include a no-change letter, Notice of Proposed Assessment, proposed overassessment, carryover adjustment, or refund-claim determination. Protest or appeal rights may follow depending on the document.

The IRS process also distinguishes the examination stage from later agreement, disagreement, administrative review, or Tax Court deadlines. A document that looks like a routine request may sit next to a much more consequential notice. Keep the full notice, not only the first page, and identify the current procedural stage before drafting a response.

An issue table should therefore include “posture” as well as “substance.” A factual explanation supporting a deduction is not the same task as preserving the right to challenge a proposed assessment.

Keep submissions reproducible

For each production, save an exact package: transmittal letter, numbered index, documents, explanation, delivery record, and the version of every spreadsheet or reconciliation used. Mark which documents were supplied to both agencies and which were unique. Keep agency communications in the matching file even if they concern the same transaction.

If an agency requests information already sent elsewhere, do not respond “the other agency has it” unless authorized advice confirms that response. Follow the receiving agency’s instructions and protect privileged, confidential, and third-party material through an appropriate process.

Review the audit pair at defined checkpoints

At every new notice, proposed adjustment, or submission, ask:

1. Did an issue or year change?
2. Did the new position create a federal-to-state reporting question?
3. Does a response for one agency need a consistency review against the other?
4. Is there a new protest, appeal, petition, waiver, or payment deadline?
5. Does the production log still match the actual files delivered?

This checkpoint prevents a correct response in one audit from becoming an unexplained inconsistency in the other.

The IRS and FTB separate payment-plan guide covers collection after liabilities exist, not the audit process. For state-specific record issues, see the California EDD payroll-tax audit records guide and California residency-audit records guide. The tax-procedure FAQ helps identify the agency and stage. Learn about the firm’s tax services.

Frequently asked questions

If I send records to the IRS, does FTB automatically receive my response?

Do not assume so. Keep separate request and delivery records and follow each agency’s instructions. Information sharing does not replace a required submission.

Does an IRS adjustment automatically control the California result?

Not every issue. California may conform to federal law in some areas and differ in others. A federal adjustment can also create a separate California reporting duty that must be evaluated under current law.

Can one deadline extension cover both audits?

No automatic cross-agency extension should be assumed. Obtain confirmation from the specific agency and preserve it in that agency’s file. Some statutory challenge deadlines may not be extendable by an examiner.

What should I assemble for counsel?

Bring both agencies’ complete notices, federal and California returns and amendments, transcripts if available, the two request/response logs, the issue-reconciliation matrix, delivery receipts, proposed adjustments, and the earliest deadline. Use the contact page for secure-transfer instructions rather than submitting confidential returns through a public form.

This article provides general information, not tax or legal advice. It does not decide conformity, reporting, limitations, protest, appeal, or petition issues for a particular taxpayer.