Instructions for Form FTB 3539

Use the California Tax Form Calculator California Tax Form 3539c as a stand alone tax form calculator to quickly calculate specific amounts for your 2026 California state tax return. Alternatively, you can use one of our Combined Federal and State Tax Estimators to quickly calculate your salary, tax, and take-home pay.

TAX PAYMENT WORKSHEET FOR YOUR RECORDS
1	Total tentative tax. Include alternative minimum tax if applicable. See instructions	1
2	Estimated tax payments including prior year overpayment applied as a credit.	2
3	Tax due. If line 2 is more than line 1, see instructions. If line 1 is more than line 2, subtract line 2 from line 1. Enter the result here and on form FTB 3539. If form FTB 3593 is filed to extend the time for payment, see instructions	3

Last reviewed: : If you believe this form requires an update, please contact us.

Quick Access Tools

Frequently Asked Questions

Are commissions/bonuses taxed differently in CA?

Withholding may use supplemental methods; final CA tax is based on total taxable income.

How does AMT work in California?

CA has its own AMT regime and adjustments; higher-income filers should check exposure.

How are RSUs/ESPP handled for CA tax?

Equity compensation is generally taxed as wage income when included in W-2; CA sources based on work.

Can I add extra CA withholding to smooth refunds?

Yes—enter additional withholding and rerun to see impact on take-home and refund.

I moved mid-year—how is CA tax handled?

Use part-year rules; apportion income between states and file CA as part-year resident if applicable.

Important Notes

All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.