California State Tax Withholding Form 2025. The de 4 form, or employee’s withholding allowance certificate, is used by california employees to determine the number of withholding allowances they claim for. For every nonwage payment you make, you must:
* required field california taxable income enter line 19 of 2025 form 540 or form 540nr. They have their own state withholding form and tax brackets and depend on the employee’s marital status and specified withholding allowances.