Tax Services

Amended Tax Returns and Prior-Year Error Correction

Fix prior-year tax return errors and claim missed deductions with a CPA-prepared Form 1040-X or business amendment. Recover refunds within the three-year statute of limitations before the window closes.

Review Prior Returns (951) 216-3121

The IRS allows you to amend a return within three years of the original filing date. That window closes permanently — and any refund owed goes with it. Common reasons clients amend: a missed deduction or credit discovered after filing, a K-1 received late, an error on a prior preparer's return, a change in filing status, or a prior-year loss that was not properly carried. We review prior returns at no charge if no amendment is warranted. If a meaningful correction exists, we prepare the amendment and coordinate the California FTB filing simultaneously.

What Is Included

Amended Return Services — Full Scope

Prior Return Review

We review your prior-year returns to identify missed deductions, errors, and planning opportunities. No charge if no amendment is warranted — we tell you upfront whether an amendment makes financial sense.

Form 1040-X Preparation

Individual amended return with a full explanation of each change in the format the IRS requires — not just a corrected number but a properly documented explanation of each adjustment.

Business Return Amendments

Amended S-Corp (1120-S), Partnership (1065), and C-Corp (1120) returns with corresponding California FTB amendments filed simultaneously to prevent mismatches between federal and state records.

Multi-Year Coordination

When an error affects multiple years — a carryover loss, depreciation basis error, or missed credit — we coordinate amendments across all affected years to capture the full correction.

California FTB Conformity

A federal amendment generally requires a California FTB amendment. We handle both simultaneously to prevent discrepancies between federal and state records that trigger follow-up notices.

IRS Response Handling

Amended returns sometimes generate IRS correspondence. We monitor processing status and respond to any requests for additional information as part of the engagement.

Who We Serve

Is This Right for You?

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Prior Preparer ErrorsClients whose prior CPA or tax preparer made an error on a filed return — missed deductions, incorrect depreciation, wrong filing status, or a calculation error — within the three-year amendment window

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Late K-1 RecipientsPartners, shareholders, and LLC members who received a corrected or late K-1 after their return was already filed and need the return amended to reflect the correct pass-through amounts

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Missed Deduction DiscoveriesTaxpayers who discover after filing that a significant deduction — a home office, vehicle expense, retirement contribution, or energy credit — was not taken on the original return

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Depreciation Basis CorrectionsProperty owners whose prior returns used incorrect depreciation methods, missed cost segregation opportunities, or incorrectly calculated basis — potentially opening years of correction

Common Questions

FAQ

Three years from the original due date of the return, including extensions. After that window closes, any refund is permanently lost. For 2021 returns, the deadline is generally April 15, 2025. Do not wait — the clock runs regardless of when you discover the error.

The IRS takes 16 to 20 weeks to process a paper-filed amended return. Electronic filing is now available for certain amended returns and processes faster. California FTB generally takes 8 to 12 weeks for amended returns.

It can. When a carryover item — a net operating loss, capital loss, or credit — is corrected, it may cascade into subsequent years. We identify and coordinate all affected years before filing, so the correction is complete and consistent across your full tax history.

Think You Overpaid? You Probably Did.

The three-year statute of limitations is ticking. A prior return review could recover thousands.

Review Prior Returns (951) 216-3121