CDTFA Notice of Determination
ARC · California sales & use tax consulting
A CDTFA Notice of Determination is a formal determination of liability—not simply a request to schedule an audit. Read it promptly, identify the tax periods and amounts, and verify the petition deadline. If you disagree, organizing the evidence matters, but preserving the appropriate response rights comes first.
- Save the entire notice and delivery information.
- Verify the account, tax program, periods, and deadline.
- Separate disputed tax, penalties, interest, and payment credits.
- Review the applicable petition requirements and filing method.
- Keep proof of submission and track every subsequent request.
For covered California sales and use tax determinations, Revenue and Taxation Code section 6561 sets a petition deadline of 30 days after service of the notice. Do not substitute the day you opened the envelope for the applicable service date.
What is a CDTFA Notice of Determination?
The California Department of Tax and Fee Administration uses a Notice of Determination to notify a taxpayer of a determined tax or fee liability. The CDTFA notice directory lists this notice in the CDTFA-1210 series. It is different from a preliminary question about a return, an audit engagement letter, or a statement showing an existing balance.
Do not assume the notice necessarily followed a completed field audit. Read the stated basis and review the accompanying documents. The first useful question is: What exactly did CDTFA determine, and which facts or calculations support it?
| Document | What to focus on | Common mistake to avoid |
|---|---|---|
| Audit correspondence | Records, periods, scheduling, and audit issues. | Assuming the audit request itself establishes a final amount due. |
| Notice of Proposed Liability | The proposed amount and notice-specific correction instructions. | Treating it as interchangeable with a determination. |
| Notice of Determination | The determined liability and applicable petition rights. | Relying on an informal discussion instead of the required filing. |
| Statement of Account | Outstanding balances, payments, and credits. | Assuming every new statement restarts an earlier petition period. |
If the matter is still at the audit stage, explore ARC’s California sales tax audit defense services.
How long do you have to dispute a sales tax determination?
Section 6561 provides 30 days after service for petitions concerning determinations under the specified sales and use tax provisions. Without a timely petition, the determination becomes final when that period expires. Verify the deadline using the actual notice, service details, and applicable rules.
This guide concerns ordinary California sales and use tax determinations. A jeopardy determination or a notice under another tax program can involve different procedures. Identify those notices separately and obtain prompt advice rather than applying this article’s general timeline.
Build a deadline record
Keep the notice, envelope, electronic delivery information, and any stated response date together. Record who verified the deadline, the filing route selected, and who is responsible for submission. If different documents show inconsistent information, flag the inconsistency for immediate review; do not resolve it by choosing the later date.
Five steps to prepare a clear response
1. Confirm the taxpayer and periods
Check the legal entity, account number, business locations, and reporting periods. Match the notice to your records before discussing calculations. Save every page and enclosure so your representative can review the complete document.
2. Separate the components of the balance
Create a worksheet with distinct lines for tax, penalties, interest, payments, and credits. Label each figure with its source. A total balance alone does not explain which component you dispute or what evidence will resolve it.
3. Identify the specific disagreement
Replace broad objections such as “the bill is wrong” with a focused issue list. Is the question about transaction classification, calculations, reported sales, purchases, or an unapplied payment? Identify what needs investigation without assuming that every difference proves an agency error.
4. Gather supporting records
- The complete notice and related audit or billing correspondence.
- Relevant returns and proof of payments.
- Audit schedules and explanations already provided.
- Invoices, credit memos, purchase documents, and transaction detail relevant to disputed items.
- Certificates or other documentation supporting a claimed deduction or exemption.
- A reconciliation connecting the disputed figure to the source records.
Preserve original files and use clearly labeled working copies. Maintain an index rather than emailing unorganized attachments without an explanation.
5. Decide who will manage filing and follow-up
Assign one coordinator. If you engage ARC or another professional, confirm the scope of that engagement and who will file. A consultation request does not itself mean someone has accepted responsibility for your deadline. Contact ARC about your CDTFA notice and have the requested dates available.
What is a petition for redetermination?
A petition asks CDTFA to reconsider the determination through its formal process. It is different from merely explaining a disagreement to the original auditor. CDTFA’s Publication 17, Appeals Procedures, explains the process and identifies Form CDTFA-416 as an available petition form. It also describes online filing through the taxpayer’s account.
Prepare the information before submission
Use the current official form and instructions to check required content, signatures, and authorization. As a preparation exercise, assemble the taxpayer’s identifying information, the notice being challenged, a clear statement of the disputed issues, the requested correction, and the relevant support. This checklist does not replace the formal requirements.
For non-online filing routes, Rule 35015, Filing a Petition for Redetermination, lists sales and use tax submission channels, including mail, hand delivery, email, and fax. Verify the current destination and instructions before submitting. Do not assume sending documents to any CDTFA employee constitutes correct filing.
Keep evidence of the filing
Save the complete submitted document and attachments, submission confirmation, and delivery evidence appropriate to the chosen method. Confirm the filing status and address any acknowledgment or follow-up promptly. Put subsequent requests in the same deadline log.
A company believes a payment was omitted from the balance. Its issue summary identifies the period, payment date, amount, confirmation number, and account activity supporting that position. That package allows a reviewer to trace the claim. An unlabeled bank statement with “please fix this” leaves the connection unclear.
What about payment, interest, or a missed deadline?
Does filing an appeal stop interest?
Publication 17 explains that interest continues to accrue on unpaid assessed tax or fees while an appeal is pending. Discuss payment allocation and the procedural consequences of payment before acting. Do not assume that disputing the amount freezes every financial consequence.
Is inability to pay the same as disputing the assessment?
No. “The amount is incorrect” and “the business cannot pay” are different problems. Prepare the facts for each separately. Payment arrangements, liability disputes, and requests for relief have different purposes. A payment discussion should not distract from an applicable petition deadline.
What if the petition deadline has already passed?
Seek a prompt case-specific review. Under Rule 35019, Administrative Protest, an untimely appeal is not a valid petition for redetermination, but may be accepted as an administrative protest at CDTFA’s discretion when there is a reasonable basis to believe the notice contains an error. It does not restore identical procedural rights.
That rule also distinguishes unpaid liabilities from amounts already paid. An administrative protest does not produce a refund of paid amounts; a valid and timely refund claim is a separate requirement. Do not assume paying the balance automatically creates such a claim. Learn about ARC’s California sales tax refund and reverse audit services.
What happens after a petition is filed?
The subsequent steps depend on the dispute and its resolution. Publication 17 describes staff review, the Appeals Bureau, and potential later proceedings before the Office of Tax Appeals. Each stage can carry its own instructions. Keep reading and responding to correspondence after the initial filing.
Put Decades of California Sales Tax Experience Behind Your Response
A CDTFA Notice of Determination puts your money—and your response rights—at stake. You need to understand how the assessment was calculated, whether the findings are supported, and what action is required before the deadline. ARC’s California sales tax audit defense and representation services help businesses address those questions and build a documented response.
Joan Armenta-Roberts brings experience from both sides of the audit process: 17 years with the California State Board of Equalization, including work as a tax auditor, followed by 18 years in public accounting at KPMG and PwC. That background informs ARC’s approach to examining audit findings, identifying disputed issues, and presenting the records and explanations that support your position. Learn more about Joan and the ARC team.
Your business deserves a review that goes beyond the total on the notice. Whether the issue involves reported sales, questioned deductions, equipment purchases, or industry-specific exemptions, ARC can help evaluate the facts and applicable California sales and use tax rules.
Before you accept the assessment or let a response deadline pass, get an experienced review. Contact ARC to discuss your Notice of Determination, or call Joan at 916-947-5160 or Zach at 213-453-1816. Have your complete notice available so the team can assess the issues and urgency.
Frequently asked questions about CDTFA Notices of Determination
Does this notice mean an audit is about to begin?
Not necessarily. A determination concerns a liability already determined. Read its basis and instructions instead of treating it as an audit appointment request.
Is the 30-day period measured from when I open the letter?
Do not assume that. Section 6561 uses service of the notice as the trigger for covered sales and use tax determinations. Verify the actual deadline promptly.
Can I just call the auditor to dispute it?
A call may clarify an issue, but do not rely on it as a petition filing. Follow the required formal procedure and retain proof of submission.
Do I need to use Form CDTFA-416?
Publication 17 identifies it as an available form rather than the only method. Use current official instructions to ensure any submission satisfies applicable requirements.
Does an appeal automatically stop interest?
No. Interest on unpaid assessed tax or fees can continue during the appeal. Discuss payment and allocation questions as part of your response planning.
Can I still get help after the deadline?
Yes, but a late response does not restore the same rights as a timely petition. Administrative protest or refund procedures may require separate analysis.
Should I wait until all my records are organized?
Do not let document preparation cause a missed statutory deadline. Obtain immediate guidance on the required timely filing and the handling of supporting information.
Does contacting ARC extend my deadline?
No. A consultation request does not extend a deadline or file a petition. Confirm who is responsible for each required action.
Discuss your CDTFA determination with ARC
Have the full notice, its stated deadline, and a brief explanation of your concerns available. Start with the dates and issues so the urgency is clear.
Joan: 916-947-5160
Zach: 213-453-1816