1. Why the California Ftb May Examine a Tax Return
The California Franchise Tax Board administers state income and franchise tax laws separately from the Internal Revenue Service. A federal return may provide important information, but California applies its own Revenue and Taxation Code provisions when determining residency, taxable income, sourcing, and business tax liability.
An audit may begin after information reported to the FTB does not match other available tax data or when a return presents an issue requiring additional review. The scope depends on the taxpayer and the issues identified, rather than simply on where the taxpayer lives or does business.
Residency and Domicile Issues
Residency disputes can become significant when a taxpayer claims to have moved out of California while maintaining substantial connections to the state. Under R&TC § 17014, residency analysis may involve where the taxpayer lives and whether an absence from California is temporary or transitory.
No single fact necessarily decides the issue. The FTB may examine the taxpayer's pattern of physical presence and other facts showing where personal and economic ties were maintained during the years under review.
Multistate Income and Business Activity
Businesses operating inside and outside California may face questions about how income is assigned to the state. R&TC § 25136 contains sourcing rules that can affect the treatment of sales other than sales of tangible personal property.
For a multistate company, the dispute may turn on where a benefit was received, how particular receipts were characterized, and whether the return applied California's sourcing rules correctly. Contracts, invoices, customer information, and accounting records may therefore become important audit evidence.
Federal Tax Adjustments
Federal changes can also create California consequences. Under R&TC § 18622, taxpayers generally must report qualifying federal changes or corrections to the FTB within six months after the federal determination becomes final.
This point matters because the California statute of limitations can be affected by whether and when the federal adjustment was reported. A taxpayer dealing with an IRS adjustment should therefore consider the related California reporting obligation rather than treating the federal matter as a completely separate proceeding.
2. How Ftb Audit Deadlines Affect a Tax Dispute

California's assessment rules do not simply duplicate federal procedure. In general, the FTB has four years to issue a deficiency assessment, although the calculation of that period depends on when the return was filed and other circumstances.
A longer period may apply in certain cases. For example, omission of more than 25 percent of gross income can generally result in a six-year assessment period. If no return was filed, different limitations rules can apply. That makes the tax year, filing date, and nature of the proposed adjustment important before deciding whether an assessment is timely.
Responding to Information Requests
During an examination, the FTB may request documents or additional explanations concerning items on the return. The request can involve financial records, transaction documents, residency evidence, or other material connected to the issue under review.
The goal should not be to send every available record without first understanding the request. Records should be reviewed for relevance, completeness, and applicable privilege concerns. A clear response can address the auditor's question without unnecessarily creating confusion about unrelated transactions or tax years.
The 60-Day Npa Protest Period
If the FTB concludes that additional tax, penalties, or interest should be assessed, it may issue a Notice of Proposed Assessment, or NPA. A taxpayer who disagrees generally has 60 days from the date of the NPA to submit a protest under R&TC § 19041.
The protest should identify the disputed adjustments and explain the factual and legal basis for challenging them. Supporting documents can be particularly important where the disagreement turns on residency, sourcing, deductions, or the characterization of a transaction.
Filing a protest does not by itself stop interest from accruing on the proposed liability. A taxpayer considering a payment or tax deposit to limit additional interest should evaluate that decision separately from the merits of the protest.
3. What Happens after an Ftb Protest
A timely protest gives the taxpayer an opportunity to challenge the proposed assessment before it becomes final. During the protest process, the FTB may request additional information and, when requested, an oral hearing may be available.
The dispute at this stage should stay focused on the adjustments that remain contested. A strong protest record connects the evidence to the applicable California tax provisions rather than simply repeating objections already made during the examination.
Appealing a Notice of Action to the Ota
After reviewing the protest, the FTB may affirm, revise, or withdraw the proposed assessment. Its determination is generally communicated through a Notice of Action, or NOA.
If the taxpayer disagrees with an adverse NOA, an appeal generally must be filed with the California Office of Tax Appeals within 30 days from the date of the notice. The OTA is separate from the FTB and provides an administrative forum for resolving California tax disputes.
Missing the appeal deadline can substantially change the taxpayer's available procedural options. For that reason, the date printed on the NOA should be reviewed as soon as the notice arrives.
Building the Administrative Record
An FTB dispute is often won or lost on the quality of the factual record. Accounting entries alone may not explain why income was sourced outside California, why a taxpayer changed residency, or why a particular transaction received specific tax treatment.
Contracts, contemporaneous correspondence, financial records, travel information, corporate documents, and other evidence may provide the missing context. Organizing those materials around each disputed adjustment can make the taxpayer's position easier to evaluate during both the protest and appeal stages.
4. How an Orange County Ftb Audit Lawyer Approaches the Case
Effective FTB audit representation starts by identifying the exact tax years, issues, and deadlines involved. From there, counsel can review the audit notice, determine what information the agency is requesting, evaluate the legal basis for proposed adjustments, and prepare responses that address the disputed issues directly.
For businesses, the analysis may involve multistate sourcing, entity-level tax questions, deductions, or federal adjustments. For individuals, residency and California-source income may require a detailed review of facts extending beyond the numbers reported on the return.
18 Sep, 2026

