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Reviewed by: William McLee
Reviewed date:
January 9, 2026

What California Form 3538 (565) (2019) Is For

California Form 3538 (565) (2019) is a payment voucher used by partnerships that need more time to file Form 565 but owe tax. It applies only to Limited Partnerships, Limited Liability Partnerships, and REMICs registered or doing business in California.

This form does not extend the payment deadline or serve as a request for an extension. California automatically provides a seven-month extension to file, but you must use this form to pay the $800 annual tax or other liabilities on time.

When You’d Use California Form 3538 (565) (2019)

Use California Form 3538 (565) (2019) when you cannot file a Form 565 by the original deadline, and you still owe partnership tax to California authorities. This payment voucher ensures your tax reaches the Franchise Tax Board on time, even though you receive an automatic filing extension under California law requirements.

You must submit the form with payment before the original due date, because the automatic extension never delays tax payment obligations for California partnership entities. If you miss the deadline, penalties apply regardless of filing status, since late payments remain subject to assessment by the Franchise Tax Board under law.

Key Rules or Details for 2019

You receive an automatic filing extension in California, yet you must pay all required taxes by the original deadline to avoid penalties and interest assessments. Late payment triggers the LLC underpayment penalty in California, even if you later file Form 565 within the extension period.

You may use prior estimated tax installments to calculate your current liability if your return is not final. The $800 annual tax generally applies unless your entity qualifies under narrow exceptions and you properly document eligibility.

Step-by-Step (High Level)

Step 1: Confirm that you cannot file Form 565 by the original deadline and that your partnership owes tax to the Franchise Tax Board. You must file California Form 3538 (565) (2019) only if both conditions apply.

Step 2: Estimate your payment amount, including the $800 annual tax and any other expected liability for the year. Use prior data or available figures if your return is not final.

Step 3: Complete the form using black or blue ink. Ensure the entity name, FEIN, and California Secretary of State number are accurate and clearly printed.

Step 4: Prepare your check or money order with your FEIN and “2018 FTB 3538” written on it. Send the form and payment to the Franchise Tax Board at the address listed on the voucher.

Step 5: Detach the payment voucher from the bottom of the form and include it with your payment. Do not staple or paperclip the form and payment together.

Step 6: Retain copies of the form and payment documents for your records. Keep proof of mailing in case the Franchise Tax Board requests verification.

Common Mistakes and How to Avoid Them

Filing delays result from specific, preventable errors during submission. Knowing what to check helps you complete the form correctly and avoid processing issues.

  • Submitting Form Without Payment: This mistake occurs when you mail the form without including a check or money order. You must submit the form only if you are mailing a check or money order with your payment.

  • Using Incorrect Entity Numbers: This mistake occurs when you enter the wrong FEIN or Secretary of State file number. You must confirm these identifiers match state and federal records.

  • Mailing After Paying Online: This mistake occurs when you submit the paper form after using Web Pay or other electronic methods. You must avoid duplicate filings by choosing only one method.

  • Leaving Off Required Check Notation: This mistake occurs when you omit “2018 FTB 3538” or your FEIN on the check. You must write both to ensure proper application.

  • Filing After the Deadline: This mistake occurs when you mail the form and payment after the original due date. You must file and pay by the original due date to avoid rejection.

What Happens After You File

After you file, the Franchise Tax Board applies your payment to your partnership’s tax account. The information you submit must be complete and accurate to ensure proper credit.

Once the Franchise Tax Board receives your payment, it will not provide you with any confirmation. The form documents timely payment and helps you avoid penalties, including the LLC underpayment penalty in California.

FAQs

Do I need to file the form if I owe no tax?

You do not need to file the form if your partnership owes nothing. The extension to the file is automatic, and no form is required if no tax is due.

Can I file the form electronically instead of mailing it?

You cannot file the form electronically. You may pay estimated tax installments online using Web Pay, credit card, or authorized tax software.

What if I underpay the amount due when submitting the form?

If you underpay, you may still owe penalties unless you qualify for a reasonable cause exception and can provide proper documentation.

Can I use the form after the original due date has passed?

You must file the form and payment by the original due date to avoid rejection. Late payment exposes your partnership to the LLC underpayment penalty in California and interest.

What if I paid on time but later received a penalty notice?

You may request a reasonable cause exception by submitting a written response with documents showing timely payment.

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