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Reviewed by: William McLee
Reviewed date:
February 12, 2026

What California Form 3514 (2018) Is For

California Form 3514 (2018) is used to calculate and claim the refundable state credit available to certain low-income workers who earned income in California during the 2018 tax year. The form determines whether a taxpayer qualifies for the credit and calculates the amount based on income, filing status, residency, and the number of qualifying children.

The credit can reduce tax owed or increase a refund, even when no California income tax is due. To receive it, the form must be completed accurately and filed with a 2018 California income tax return. Filing the return alone is not sufficient; the credit is disallowed if the form is missing.

When You’d Use California Form 3514

This form is filed when submitting a 2018 California income tax return and claiming the state earned income credit. It applies to original returns, late-filed returns, and amended returns for that year.

Taxpayers who filed a 2018 return but did not claim the credit may still be able to do so by filing an amended return within the allowable period, which is generally four years from the original filing deadline. Late filing does not automatically disqualify a claim, but processing may take longer, and the form must be included with the return for the credit to be considered.

Key Rules or Details for 2018

Eligibility rules in 2018 were narrower than in later years, making it essential to apply the correct standards. California EITC eligibility depended on earned income, federal adjusted gross income, residency, and filing status.

Key eligibility requirements for 2018 include:

  • For 2018, taxpayers without qualifying children generally had to have both federal adjusted gross income and California earned income below $16,751.

  • For 2018, taxpayers with one or more qualifying children generally had to have both federal adjusted gross income and California earned income below $24,951.

  • Earned income for this credit generally came from wages subject to California withholding or from net self-employment income.

  • Investment income generally had to be less than $3,699 for the year.

  • The taxpayer, spouse (if filing jointly), and any qualifying children generally need valid Social Security Numbers issued by the filing deadline.

Filing status affected eligibility. Married taxpayers could not file separately and still claim the credit. Single, head of household, married filing jointly, and qualifying widow or widower statuses were permitted. Nonresidents and part-year residents were required to live in California for more than half of the year to qualify.

California EITC eligibility was also affected by prior disallowances. Taxpayers who previously had the credit reduced or denied for reasons other than math errors were required to answer additional questions and meet stricter review standards when filing again.

Step-by-Step (High Level)

Filing the form involves confirming eligibility and calculating the credit using worksheets and tables.

Step 1: Confirm basic qualifications

The taxpayer confirms income limits, filing status, residency requirements, and valid Social Security Numbers for all individuals listed on the return.

Step 2: Calculate investment income

Investment income is calculated using the applicable worksheet, based on the type of return. If the total exceeds $3,699, the credit cannot be claimed.

Step 3: Determine qualifying children

Taxpayers with children are required to provide detailed information for each child, including age, relationship, number of days spent in California, and identifying information.

Step 4: Calculate California earned income

Wages subject to California withholding and net self-employment income are combined. Certain income types may be included or excluded based on elections allowed under the rules for 2018.

Step 5: Calculate the credit amount

The credit is determined using the official credit table and comparing earned income with the federal adjusted gross income. The smaller amount is used to calculate the final credit.

The Form 3514 instructions provide the required worksheets and tables for each step. Careful use of those instructions helps ensure accurate calculations and reduces the risk of delays.

Common Mistakes and How to Avoid Them

One of the most common errors is claiming a child who does not meet the residency or age requirements. A qualifying child must have lived with the taxpayer in California for more than half of the year, which means spending more than 183 days in California in 2018.

Another frequent issue is failing to attach the completed form to the return. Even eligible taxpayers will have the credit denied if the form is missing or incomplete. All required sections should be reviewed before filing, particularly the sections related to child information and income totals.

Income misreporting is another source of disallowance. Investment income, unemployment compensation, and pension income are not considered earned income. Reviewing the Form 3514 instructions and matching state income figures with the federal return can help prevent inconsistencies that may trigger a review.

Filing status errors also occur, especially among married taxpayers who file separately. Verifying the correct filing status before submitting the return helps preserve eligibility and avoid corrections later.

What Happens After You File

After filing, the California Franchise Tax Board reviews the return and the attached form to confirm eligibility and accuracy. Electronic filings are generally processed more quickly than paper returns, although review times vary.

Some returns require additional review due to income levels near eligibility thresholds or issues related to qualifying children. When documentation is requested, responding within the stated timeframe helps avoid delays or denial. Approved credits are applied to the tax balance or included in the refund issued to the taxpayer.

If the credit is denied, the taxpayer receives a notice explaining the reason and outlining appeal rights. Repeated improper claims may result in restrictions on future eligibility.

FAQs

Who must file California Form 3514 for 2018?

Any taxpayer claiming the state earned income credit for the 2018 tax year must include California Form 3514 with the California income tax return.

Can the credit be claimed on a late-filed 2018 return?

Yes, filing after the original deadline does not automatically disqualify the claim, but the completed form must be attached to the return.

Can I amend a return to add the credit?

Yes, taxpayers who did not claim the credit on an original 2018 return may file an amended return within the allowed period to claim it.

Do ITIN holders qualify for the 2018 credit?

No, for 2018, the credit requires valid Social Security Numbers issued by the filing deadline for the taxpayer, spouse (if filing jointly), and any qualifying children.

Does self-employment income count as earned income?

Yes, net self-employment income is treated as earned income when calculated correctly and reported in accordance with the instructions on the form.

What happens if the credit is denied?

The state issues a notice explaining the reason for denial and outlining appeal options. Repeated improper claims may result in future filing restrictions.

What records should be kept after filing?

Taxpayers should retain income documents, residency records, and proof of qualifying child residency in case the return is reviewed.

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