Got a notice from the California Franchise Tax Board? Here is what it usually means

A letter from the California Franchise Tax Board (FTB) can be more confusing than one from the IRS, because fewer people have seen one before. The FTB is California’s income tax agency. It handles your Form 540, the state return that goes alongside your federal Form 1040. If something on the state side looks off, this is who writes to you.

Most FTB letters fall into a handful of types. Here is what each one usually means and what it needs from you.

What is an FTB 4600 Request for Tax Return?

The FTB 4600 is the letter that says the state believes you should have filed a California return and has no record of one. The FTB gets its information from many places: W-2s and 1099s filed by employers and banks, federal return data shared by the IRS, business licenses, and even mortgage interest records. If that information says you earned enough to file and the FTB cannot find your Form 540, you get a 4600.

The letter gives a tax year and a reply date. The number of days is printed on the notice, so check it rather than guessing. You have a few ways to answer:

• You already filed. Send a copy of the return and proof of when it was filed.
• You did not need to file. Explain why, for example you lived in another state that year.
• You did need to file. File the return now, with the letter.

Ignoring a 4600 is the worst choice. If the FTB hears nothing, it can prepare a return for you using the income it knows about, with none of the deductions or credits you would have claimed, and bill you for the result plus penalties and interest.

Why did the FTB change my Form 540?

A Notice of Proposed Assessment or a Notice of Tax Return Change means the FTB reviewed your return and adjusted something. The common reasons we see:

• Math or transfer errors between the federal and state return.
• A credit the FTB says you did not qualify for, such as the California Earned Income Tax Credit or the renter’s credit.
• Withholding claimed on the return that does not match what employers reported.
• Estimated payments you counted that the FTB did not receive under your account.

Read the notice line by line. It shows what you reported, what the FTB changed it to, and the reason. Many of these can be fixed with one document, such as a W-2 showing the withholding or a canceled check for the estimate.

What happens after the IRS changes a federal return?

This one surprises people. If the IRS adjusts your federal return, for example after a CP2000, California finds out. The IRS and FTB share data. You are expected to report the federal change to the FTB, and if you do not, the FTB will usually send its own notice later, with interest that has been building the whole time.

The right move is to amend the California return as soon as the federal change is final. For individuals that means a Form 540 with Schedule X attached, which is the schedule that explains the change. Our prior year and amended returns service handles this.

What does a balance due or collection notice mean?

If the FTB thinks you owe money, you will get a statement showing the amount, then a series of increasingly firm letters. California can be faster than the IRS at the collection stage. The FTB can take money from a bank account or garnish wages without going to court. If a letter mentions a levy or an order to withhold, treat it as urgent the day it arrives.

You still have options. Payment plans exist. Penalties can sometimes be removed for a good reason. But those options narrow with every letter you do not answer.

What about notices to a business?

Corporations and LLCs get their own letters. An S corporation in California files Form 100S, and the state charges it a minimum franchise tax every year it exists, even in years with no income. LLCs owe an annual tax plus a fee that depends on the LLC’s California income. The amounts are set by the state and published at ftb.ca.gov. A common surprise is a bill for a business that stopped operating but was never formally dissolved with the Secretary of State. The entity keeps owing the minimum until it is closed properly. Our small business tax preparation service deals with these letters and with closing an entity that should have been closed years ago.

How do you reply to the FTB?

Reply in writing, by the date on the notice, with copies of the records that support your position. Keep a copy of everything you send and note the date you mailed it. If the notice has a response form, use it. If you need to call, have the notice number and your account information ready before you dial.

At the Reseda office on Tampa Ave we see clients from across the Valley, from Canoga Park down the 101 to Sherman Oaks, and FTB letters are a regular part of the work. Through our tax audit support and notice response service, we help you understand the notice, gather the records, and prepare the written reply. We explain your options, including when you may need an enrolled agent or attorney, and we can refer you.

When to call

Call (818) 401-7468 the week the letter arrives so there is time to pull records before the deadline. If the notice mentions a levy or a withholding order, call the same day. You can also use the contact page to send us a photo of the notice before you come in.