California e-file Return Authorization for Corporations

Use the California Tax Form Calculator California Tax Form 8453c 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.

California e-file Return Authorization for Corporations
Part I Tax Return Information (whole dollars only)
1	Total income (Form 100, line 9, Form 100S, line 8, Form 100W, line 9 or Form 100X, Line 6)				1
2	Taxable income (Form 100, line 22, Form 100S, line 20, Form 100W, line 22 or Form 100X, Line 10)				2
3	Total tax (Form 100, line 30, Form 100S, line 29, Form 100W, line 30, Form 100X, Line 18)				3
4	Tax due (Form 100, line 39, Form 100S, line 38, Form 100W, line 36 or Form 100X, Line 20)				4
5	Overpayment (Form 100, line 40, Form 100S, line 39, Form 100W, line 37 or Form 100X, Line 27)				5
Part II Settle Your Account Electronically for Taxable Year 2017
6	Direct deposit of refund (For Forms 100, 100S, and 100W only.)
7	Electronic funds withdrawal 7a Amount 7b Withdrawal date (mm/dd/yyyy)
Part III Schedule of Estimated Tax Payments for Taxable Year 2018 (These are NOT installment payments for the current amount the corporation owes.)
		First Payment	Second Payment	Third Payment	Fourth Payment
8	Amount
9	Withdrawal Date
Part IV Banking Information (Have you verified the corporation’s banking information?)
10	Routing number
11	Account number 12 Type of account: Checking Savings

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

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Frequently Asked Questions

How does Paid Family Leave show up on taxes?

PFL benefits are administered via EDD; federal/state taxability differs—check current guidance.

Does California allow Section 125 (cafeteria plan) pre-tax?

Many Section 125 items reduce taxable wages; details depend on CA conformity and plan design.

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.

Does California tax ESOP distributions?

Distributions are generally taxable per federal/state rules; timing/character matters.

Can I add extra CA withholding to smooth refunds?

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

Important Notes

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