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IRS Notice CP21C – Changes to Your Form 1040

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The IRS sent CP21C to notify you that data processing adjusted your tax return, resulting in a zero balance.

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Type of Notice: Return accuracy

Most common tax problem area: IRS return and account problems

Why you received IRS Notice CP21C

  1. After you filed your tax return you discovered an error.
  2. You either contacted the IRS to correct the error or filed an amended return.
  3. The IRS corrected the error and made an adjustment to your return.
  4. The IRS sent CP21C to notify you that the adjustment resulted in a zero balance on your return.

Notice deadline: N/A

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