IRS Letter 178C – Amended Return Incomplete

The IRS sends Letter 178C to inform you that additional information is needed to process your amended return.

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Type of Notice: Return accuracy

Most common tax problem area: Amended returns

Other tax problem areas: IRS penalties

Why you received IRS Letter 178C

  1. You filed an amended tax return.
  2. The IRS sent Letter 178C to notify you that additional information is needed to process your amended return.

Your options to address IRS Letter 178C

  1. Provide the requested documentation

Notice deadline: N/A

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