1. Tax Attorney Services Depend on the Stage of a CDTFA Dispute
The California Department of Tax and Fee Administration (CDTFA) administers state sales and use taxes, including applicable district taxes. The legal response depends on whether a business faces a filing problem, audit, formal assessment, or collection action. Federal IRS tax notices and Los Angeles city business tax notices involve different agencies and procedures.
Filing Errors and Unreported Sales Tax
An omitted return or understated taxable sales may call for a corrected filing, but the underlying cause matters. Compare filing periods, taxable receipts, registration history, and records showing who collected tax. A tax attorney can assess prior-period exposure and whether a correction addresses the issue before CDTFA issues a determination. If a seller began operating without registration, the start date depends on its actual activities and applicable rules, not simply its first California customer. Review those triggers separately under California sales tax nexus rules.
CDTFA Audits and Proposed Adjustments
CDTFA auditors may examine sales reports, invoices, bank deposits, purchase records, and resale certificates. A deposit is not necessarily a taxable sale, and a marketplace payout may be net of refunds or fees. An attorney can evaluate the legal basis of an adjustment, communicate disputed classifications to the auditor, and preserve a record of the response. If the audit estimates sales from a sample, identify whether unusual transactions distorted the calculation. An auditor's proposed adjustment is not the same as a final liability.
2. CDTFA Case Reviews Connect Tax Figures to Supporting Records
A case review begins with the taxpayer's account, the relevant reporting periods, and the specific transactions CDTFA questions. Matching the assessment to source records can expose calculation errors as well as disputes about what the law taxes.
Sales Reconciliation and Resale Documentation
Reconcile filed returns with order reports, credits, voids, and invoices, rather than treating bank deposits as gross taxable sales. For claimed sales for resale, compare resale certificates with the purchaser and transaction records. For platform sales, identify the transactions a registered facilitator handled and those sold directly. A separate marketplace facilitator tax review explains collection responsibility; the dispute file must show which entries actually contributed to the assessment.
District Taxes and Business Location Evidence
District tax exposure depends on the transaction, applicable sourcing rules, and rates effective when the sale occurred. A Los Angeles County mailing address alone cannot establish the correct rate for every transaction. Compare delivery addresses, storefront locations, invoices, and tax collected at checkout. A business selling from multiple locations may need separate schedules for the periods and districts challenged. An attorney can distinguish an incorrect rate from a dispute over where a transaction is sourced.
3. CDTFA Assessment Appeals Have Defined Filing Requirements
A Notice of Determination identifies assessed tax and may include interest or penalties. Before disputing it, confirm the notice type, mailing date, reporting periods, and supporting audit schedules. Discussions with an auditor do not replace a formal petition.
Petitions for Redetermination after an Assessment
Under Revenue and Taxation Code § 6561 and Regulation 35007, a sales and use tax petition generally must be filed within 30 days after CDTFA mails a Notice of Determination. Regulation 35008 requires a written, signed petition stating the contested amounts and reasons. Regulation 35015 permits designated filing channels, including mail and email. Keep submission evidence and request an appeals conference where appropriate. A timely petition generally prevents the determination under review from becoming final during the appeal; jeopardy determinations follow different rules.
Appeals Bureau Decisions and OTA Review
CDTFA's Appeals Bureau considers disputed evidence and legal arguments, sometimes through a conference or further audit work. If its decision is adverse, Regulation 35065 generally allows 30 days from the mailing of the letter explaining appeal options to request reconsideration or appeal to the Office of Tax Appeals (OTA), subject to applicable rules. OTA is a separate state administrative forum, not a local trial court. An attorney can organize exhibits and identify which objections remain open at each stage.
4. Collection Problems and Refund Claims Need Different Strategies
An unpaid, final balance presents different choices from a disputed assessment. Collection remedies address payment, while a refund claim addresses tax already paid in excess of what was owed. Neither route should be confused with a timely petition.
CDTFA Collection Notices and Installment Arrangements
An overdue liability can lead to collection notices, liens, or levies. CDTFA may consider a payment arrangement based on the taxpayer's situation, but approval is discretionary and interest may continue. Review account records, payment credits, and the basis for any penalties before proposing terms. An attorney can also evaluate whether a balance remains under appeal or concerns a separate entity. Income, payroll, and ownership matters may require a broader business tax review.
Refund Claims for Payments Already Made
Revenue and Taxation Code § 6902 sets alternative limitations periods, commonly involving a three-year reporting-period measure or six months from a final determination or payment, whichever applicable deadline is later. The calculation depends on the return schedule and circumstances. A written claim should identify the periods, grounds, and alleged overpayment, supported by invoices or other records. Payment does not itself revive an expired petition deadline. If CDTFA denies the claim, further review follows separate procedures.
5. Common Questions about CDTFA Tax Representation
Representation authority and personal exposure may affect the choice of legal assistance.
Can a CPA Represent a Business during a CDTFA Audit?
Yes. CDTFA permits a taxpayer to use a CPA, attorney, or other authorized representative, with a power of attorney or other authorization as required. A CPA may reconstruct sales records and reconcile filings. A tax attorney focuses on legal classifications, disputed assessments, formal appeals, and liability questions. The decision depends on the work needed, not the representative's title alone.
Can an Owner Be Personally Liable for Unpaid Sales Tax?
Business closure does not automatically transfer a tax debt to an owner. Under Revenue and Taxation Code § 6829, CDTFA must establish statutory conditions, including termination, dissolution, or abandonment; a responsible person's willful failure to pay; and qualifying sales-tax reimbursement or use-tax circumstances. The unpaid taxes must have become due during the person's period of responsibility. Ownership or a managerial title, standing alone, is insufficient.
05 Nov, 2026
