Find helpful guides to California tax forms, including individual income tax, business taxes, sales and use tax, withholding, estimated taxes, and other state tax filings. Learn what each California tax form is used for, who needs to file it, what information you need, and how to complete and file the form correctly.
How to use California FTB 3893 to pay the 9.3% pass-through entity elective tax: who can elect, the June 15 and original-due-date payments, the new 12.5% credit reduction for a short June payment, the 2026-2030 program and where to mail the voucher. Verified against the Franchise Tax Board’s 2026 instructions.
![California Form 100 — Corporation Franchise or Income Tax Return [thisnextyear]](https://taxformdesk.com/wp-content/uploads/2026/10/out-feat-form-100.jpg)
How to complete California Form 100, the Corporation Franchise or Income Tax Return: who files, the 8.84% rate, the $800 minimum franchise tax and first-year relief, the April 15 due date and 11th-month extension, line-by-line notes and where to mail it. Verified against the Franchise Tax Board’s 2025 booklet.
![California Form 540NR — Nonresident or Part-Year Resident Income Tax Return [thisnextyear]](https://taxformdesk.com/wp-content/uploads/2026/10/out-feat-form-540nr.jpg)
How to complete California Form 540NR for nonresidents and part-year residents: who files, how California computes your tax rate on total income, prorated exemption credits, the April 15 due date and October 15 extension, group returns and where to mail all six sides. Verified against the Franchise Tax Board’s 2025 booklet.
![California Form 568 — Limited Liability Company Return of Income [thisnextyear]](https://taxformdesk.com/wp-content/uploads/2026/10/out-feat-form-568.jpg)
How to complete California Form 568, the LLC Return of Income: who files, the 15th-day-of-the-3rd-month due date, the 7-month extension, the $800 annual tax versus the LLC fee table, member schedules, nonresident members and where to mail it. Verified against the Franchise Tax Board’s 2025 booklet.
How to pay the California $800 annual LLC tax with FTB 3522: who owes it, the April 15 due date, first-year rules, exemptions, series LLCs, where to mail the voucher and when not to mail it. Verified against the Franchise Tax Board’s 2026 instructions.
How to fill out California FTB 3514 to claim the CalEITC, Young Child Tax Credit, and Foster Youth Tax Credit — the income limits, why no qualifying child is required, and the eligibility questions that matter.
How to fill out California Form 540-ES — the unusual 30/40/0/30 installment schedule, who needs to pay, and the safe-harbor rules that avoid an underpayment penalty.
How to fill out California Schedule CA (540) — the column-by-column adjustments between federal and California income, including the full exemption for Social Security benefits, and where its totals carry to Form 540.
How to fill out California Form DE 4 — the three worksheets for allowances, itemized deductions, and extra withholding, and why it replaced the federal W-4 for state withholding purposes.
How to complete California Form 540 for 2025 — filing status and exemptions, California adjustments on Schedule CA, the tax rate schedules, credits, use tax, deadlines, penalties, and where to file. Verified against the FTB’s 2025 form and booklet.