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.
| Part I Tax Return Information (whole dollars only) | ||||||
| 1 | 1 | |||||
| 2 | 2 | |||||
| 3 | 3 | |||||
| 4 | 4 | |||||
| 5 | 5 | |||||
| Part II Settle Your Account Electronically for Taxable Year 2017 | ||||||
| 6 | ||||||
| 7 | 7a 7b | |||||
| 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 | ||||||
| 11 | 12 Type of account: | |||||
Last reviewed: : If you believe this form requires an update, please contact us.
Quick Access Tools
Frequently Asked Questions
How are relocation reimbursements taxed in CA?
Most taxable as wages unless qualified exclusions apply; withhold and include in CA income.
How does community property affect my CA return?
Married/RDP filers may have community property allocation rules; see CA guidance.
Where can I run the full California calculator?
Open the California State Tax Calculator for a tailored scenario.
Does CA tax gambling winnings?
Yes—gambling winnings are generally taxable in CA; losses may have different deductibility rules.
How do I choose standard vs itemized for CA?
Run both—CA limits and allowed items differ from federal; pick the lower liability.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.