Form 1040-X是什麼？

Form 1040-X（Amended U.S. Individual Income Tax Return）用於更正已提交的報稅，如1040、1040-SR或1040-NR表格。只要你已經報稅，之後發現任何錯誤：

• 忘記某張 1099 表格
• 漏掉國外收入
• 扣除／抵免沒填
• 填錯報稅身分
• 需要補交像 2555、1116、8949、8621 等表格

都必須透過 1040-X 重新送一次報稅。

→什麼情況必須提交 1040-X？

以下是最常見必須更正報稅的狀況：

1. 漏報收入

例如：

• 忘了 1099-NEC（自雇收入）
• 忘記 1099-DIV 或 1099-INT
• 漏掉 1099-K（例如直播平台、電商、PayPal 等）
• 漏報海外收入（台灣薪資、利息、股息）

2. 扣除或抵免填錯

如：

• Child Tax Credit
• Earned Income Tax Credit
• 教育抵免（AOTC / LLC）
• 外國稅額抵免（Form 1116）

3. 填錯報稅身分

例如把 Single→Head of Household 或 MFJ↔MFS 填錯。

4. 計算錯誤（尤其手動報稅）

只要導致稅額不同，都必須提交 1040-X。

5. 收到 IRS 通知要求更正

如：

• CP2000（調整收入）
• CP12（IRS 自動調整）
• CP14（你欠稅）

→哪些情況不能使用 1040-X？

以下不需要 1040-X：

• 更改地址 → 用 Form 8822
• 銀行資訊填錯 → 等 IRS 自動退件
• IRS 自己會重新計算 的內容（例如 Recovery Rebate Credit）

美國註冊會計師 羅霞 提醒您如果有重大漏報項目，可能會造成要補稅及利息，納稅人需謹慎處裡。務必諮詢專業合格的CPA，以確保稅務合規，避免因高額利息增加成本。

如果有其他疑問或者需要更多的幫助，

歡迎來電諮詢美國註冊會計師 羅霞 +886 980919600 
或者 E-mail: ustaxproservice@gmail.com 
也歡迎造訪我公司官網: https://www.ustaxproservice.com
(美稅服務有限公司 USTAX Service LLC)

Form 1040-X (Amended U.S. Individual Income Tax Return) is used to correct a previously filed tax return, such as Form 1040, 1040-SR, or 1040-NR.
If you have already filed your tax return and later discover any mistakes—such as:

• Missing a 1099 form
• Leaving out foreign income
• Forgetting deductions or tax credits
• Selecting the wrong filing status
• Needing to add forms like 2555, 1116, 8949, 8621, etc.

—you must file Form 1040-X to resubmit the corrected return.

→When Do You Need to File Form 1040-X?

Below are the most common situations where an amended return is required:

1. Unreported Income

Examples include:

• Forgetting a 1099-NEC (self-employment income)
• Missing a 1099-DIV or 1099-INT
• Forgetting a 1099-K (from streaming platforms, e-commerce, PayPal, etc.)
• Omitting foreign income (such as Taiwan salary, interest, or dividends)

2. Incorrect Deductions or Credits

Such as:

• Child Tax Credit
• Earned Income Tax Credit
• Education credits (AOTC / LLC)
• Foreign Tax Credit (Form 1116)

3. Incorrect Filing Status

For example:

• Selecting Single → Head of Household, or
• Choosing the wrong status between MFJ ↔ MFS

4. Calculation Errors

Especially common when filing manually.
If any mistakes change your tax liability, you must file Form 1040-X.

5. IRS Notices Requiring Corrections

Such as:

• CP2000 (income discrepancy)
• CP12 (IRS corrected your return)
• CP14 (balance due)

→When You Do Not Need Form 1040-X

The following situations do not require an amended return:

• Address change → Use Form 8822 instead
• Incorrect bank information → Wait for the IRS to automatically reject the direct deposit
• Situations where the IRS recalculates the amount automatically
  (e.g., Recovery Rebate Credit adjustments)

USCPA Luo Xia reminds you that significant omissions in your tax return may result in additional tax and interest assessments. Taxpayers should handle such matters with caution. It is essential to consult a qualified CPA to ensure full tax compliance and avoid unnecessary costs caused by substantial interest charges.

If you have any questions or need further help,

please contact us at the USCPA Luo Xia +886 980919600

or Email: ustaxproservice@gmail.com 

Also welcome to visit our website: https://www.ustaxproservice.com 

(USTAX Service LLC)