California FTB letter: Review Your State Tax Return Letter (no single public notice number listed)

A ‘Review Your State Tax Return’ letter from the California Franchise Tax Board means the FTB has found something in your return that doesn’t match their records or that requires your explanation. It’s the FTB’s way of saying: before we process your return or issue your refund, we need more information from you. These letters don’t carry a specific public notice number, but they’re a routine part of the FTB’s return processing review.

Common triggers include income amounts that differ from employer or financial institution reports, credits or deductions that the FTB’s automated system flagged as unusual, residency status that’s unclear, or carryforward amounts from prior year returns that don’t match FTB records. California matches return data against employer filings, 1099s, K-1s, and federal return data, and discrepancies of even a few hundred dollars can trigger a review letter.

The Reed Corporation treats these letters as a first-line inquiry that needs a prompt, organized response. If you respond well within the stated window, most review letters close without an assessment. Respond poorly — or not at all — and the FTB escalates to a formal audit or Notice of Proposed Assessment.

Your response needs to directly address whatever item the FTB flagged. Read the letter carefully — it usually specifies the line number, the dollar amount in question, and what documentation the FTB wants to see. Common responses include sending W-2s or 1099s that match reported income, bank statements showing income or deduction amounts, receipts for claimed deductions, or a written explanation of your residency and filing status.

The key is precision. Send exactly what the letter asks for, organized by the items listed in the notice. If the FTB asked about three specific line items, address all three — not just the one you’re most confident about. An incomplete response gives the FTB grounds to continue the review on the unanswered items and can make the whole process take much longer. Include your Social Security Number, tax year, and the notice ID on every document you send.

We draft these responses as formal packages — a cover letter that maps each FTB question to its corresponding documentation, followed by tabbed exhibits. We also send via fax with a confirmation receipt because certified mail tracking through the FTB’s mail system can be slow and unreliable. After submission, we calendar a 45-day follow-up date to check status.

Yes. If your California return shows a refund and the FTB has sent a review letter, they’ll hold that refund until the review closes. Under California Revenue and Taxation Code Section 19002, the FTB isn’t required to issue a refund while a return is under examination. The review can hold your refund for 30 to 120 days or longer depending on how quickly you respond and how complex the issue is.

If your refund is being held, California does pay interest on the refund amount once it’s released — but only after a certain point. Under R&TC Section 19340, interest on overdue refunds generally starts accruing 45 days after the original return due date (or filing date, if later). So if the FTB holds your refund for 60 days and then releases it, you’d receive interest for part of that period. It’s not a lot, but it’s something.

We let clients know upfront when a refund is involved and the review is in progress, because the timeline is rarely the quick few weeks people hope for. Setting realistic expectations and submitting a complete response the first time is the best way to minimize the hold period. We’ve seen clean responses with solid documentation get refunds released in as few as 30 days.

Not formally, but it’s on the same spectrum. A return review letter is a correspondence-level inquiry, which is a step below a formal audit. The FTB is questioning specific items without committing to a full examination of every line of your return. If your response satisfies the FTB, the matter closes at this level and never becomes a formal audit. If your response raises more questions or is incomplete, the FTB can escalate to a full audit under California Revenue and Taxation Code Section 19082.

The practical difference between a correspondence review and a formal audit is scope. A correspondence review focuses on the specific items listed in the letter. A formal audit can expand to cover every item on your return for multiple years. That’s why responding carefully to the initial review letter matters — a poorly organized or incomplete response can accidentally invite broader scrutiny.

The Reed Corporation’s approach is to treat every correspondence review as if it could escalate. We don’t take shortcuts in the response package. A thorough initial response is almost always cheaper and faster than an audit that could have been avoided with better documentation upfront.

Several items on California returns tend to trigger review letters more often than others. The California Earned Income Tax Credit (CalEITC) is one — the FTB verifies EITC claims closely because fraud is common and the credit can reach up to $3,756 per year for qualifying filers (2025 tax year). The Young Child Tax Credit (YCTC) of up to $1,189 (2025 tax year) and the Foster Youth Tax Credit (FYTC) are also closely reviewed. Business deductions that are large relative to income — Schedule C expenses that approach or exceed reported revenue — routinely draw letters.

Rental property deductions are another frequent trigger, especially passive activity losses claimed under IRC Section 469 and California’s conforming rules. California doesn’t always conform to federal passive loss rules the same way, so a rental loss that’s fully deductible on your federal return might be limited on California. The FTB also scrutinizes large charitable deduction claims, education credits, and the net operating loss (NOL) deductions, since California suspended the NOL deduction for tax years 2020 through 2022.

If you’ve claimed any of these items and received a review letter, the response strategy depends heavily on which credit or deduction is at issue. We’ve handled review letters for every type of California credit and deduction, and the documentation requirements differ significantly depending on what’s being questioned. CalEITC reviews, for example, require income and residency documentation that’s different from what a rental property review needs.