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California Form DE 9ADJ (2020): Wage & Contribution Guide

Understand how California Form DE 9ADJ (2020) corrects DE 9 and DE 9C filings and ensures accurate reporting with the Employment Development Department.
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Published date:
January 9, 2026
Updated date:
May 8, 2026

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Form — California Form DE 9ADJ (2020): Wage & Contribution Guide

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Published date:
January 9, 2026
Updated date:
May 8, 2026

What California Form DE 9ADJ (2020) Is For

California Form DE 9ADJ (2020) corrects previously filed DE 9 and DE 9C reports submitted to the California Employment Development Department for quarterly payroll adjustments. Employers use this application form to update wages, employee names, Social Security numbers, or employment tax details that were initially reported. It also resolves errors involving unemployment insurance tax amounts, Employment Training Tax calculations, or State Disability Insurance reporting.

This paper form supports accurate reconciliation when employers identify discrepancies after filing their initial quarterly information. It works in conjunction with DE 9 forms to ensure that corrected wages reflect the proper payment status and benefits paid. The California Employment Development Department relies on these adjustments to preserve accurate unemployment insurance program records for eligible employers.

When You’d Use  California Form DE 9ADJ (2020)

Employers file this form when wage information requires correction after reviewing payroll records for a closed quarter. Adjustments may involve inaccurate employee wages, incorrect withholding entries, or misreported Personal Income Tax amounts. Employers also use this form after identifying issues that affect their unemployment benefits reporting obligations.

Late amendments occur when errors appear during internal audits or after receiving notices of unemployment insurance from California’s unemployment department. This includes corrections linked to unemployment taxes, benefit reimbursements, or domestic employment classifications. The form applies whenever employers must address mistakes without having to refile the original tax forms completely.

Key Rules or Details for 2020

Refund claims for overpayments must follow strict filing requirements established by the State of California for quarterly adjustments. Employers must submit separate forms for each corrected quarter, regardless of the complexity of the issue. Credits involving employee withholdings apply only after employees receive reimbursements for incorrect deductions.

The Employment Development Department prohibits the reporting of annual totals on this form because quarterly reporting is necessary to support the accuracy of unemployment insurance benefits. Adjustments involving State Disability Insurance require employers to verify refund eligibility before requesting account credits. Employers must calculate penalties and interest accurately for amounts owed on amended filings.

Step-by-Step (High Level)

  • Step 1: The employer determines whether corrections affect Form DE 9 totals, DE 9C wage details, or both forms for the selected quarter.

  • Step 2: The filing party accurately completes the identification fields on the application form, including name, address, EDD Customer Account Number, and quarter dates.

  • Step 3: The person preparing the adjustment explains each correction clearly, referencing tax forms, payroll records, Income Tax withholdings, and affected Personal Income Tax entries.

  • Step 4: Each adjustment entry includes both the original and corrected figures for wages, taxes, and totals for Form DE-9 and related DE-9 forms.

  • Step 5: The employer updates employee names, Social Security numbers, wage plan codes, and wages, taking into account applicable rules for domestic-only employers.

  • Step 6: The responsible preparer calculates additional taxes, penalties, interest, or credits, then signs and submits the completed form using electronic filing methods.

For detailed instructions and practical insights to help you complete IRS forms accurately, visit our IRS Form Help Center.

Common Mistakes and How to Avoid Them

Submission issues frequently arise because filers overlook specific procedural requirements that affect state payroll reporting accuracy. Identifying these recurring errors strengthens compliance and supports smoother processing within California’s unemployment agency systems. Clear, complete filings help prevent correction requests that delay updates to employer accounts.

  • Omitted Signatures: Adjustment forms are returned when signature fields are left blank, and filers must verify all required signatures before sending the application form.

  • Incorrect Employer Identification Numbers: Mismatched identifiers occur when employer numbers differ from those in Internal Revenue Service records, and filers must verify accurate entries on all tax forms.

  • Missing Wage Attachments: DE 9 forms are delayed when Form 1099G or required wage schedules are excluded, and filers must include all necessary attachments for amended filings.

  • Incorrect Prior Quarter Figures: Errors occur when corrected amounts replace originally reported totals, and filers must enter prior figures exactly as initially filed.

  • Improper Employee Detail Updates: Wage corrections fail when employee names or Social Security numbers are incomplete, and filers must verify these fields before submitting corrections.

What Happens After You File

The Employment Development Department processes forms in the order received and verifies corrected information against previously submitted records. Simple wage adjustments typically process more quickly than claims involving unemployment insurance benefits. Incomplete filings result in returned forms that require additional documentation.
Refunds are applied to employer accounts, except when outstanding balances exist for prior assessments or unemployment claims that have not been settled. Additional taxes, including penalties and interest, are accrued in accordance with state rules. Corrected information updates employee wage histories supporting unemployment insurance program eligibility.

FAQs

Can Form DE 9ADJ be filed electronically?

Yes, electronic filing methods are available and often reduce delays when updating DE 9 forms within California’s unemployment agency systems.

Do specific rules limit prior quarter corrections?

Refund-based corrections follow set deadlines, while increased liabilities can be submitted at any time, provided the figures match those previously filed on tax forms.

Do adjusted wages influence unemployment insurance benefits?

Yes, corrected wages update records used by California’s unemployment department to verify benefits paid under the Unemployment Insurance Act.

How are incorrect Social Security numbers corrected on amended filings?

Incorrect identifiers must be corrected on the application form to ensure accurate wage posting and prevent issues related to Form 1099G reporting.

Does this form allow corrections related to Paid Family Leave Benefits?

Yes, amended wage information affecting Paid Family Leave Benefits requires submission through Form DE 9ADJ to maintain accurate Personal Income Tax reporting.

https://www.states.gettaxreliefnow.com/State%20of%20California/Form%20DE%209ADJ.pdf
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