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IRS Notice CP11: Tax Return Error (Balance Due)

You've received a CP11 notice because the IRS found an error on your tax return that resulted in additional taxes owed. Here's what you need to know and how to respond.

What Does CP11 Mean?

The CP11 notice is sent when the IRS has made changes to your tax return that result in you owing additional taxes. This typically happens when:

  • You made mathematical errors on your return
  • You claimed incorrect deductions or credits
  • Income was reported to the IRS that wasn't on your return
  • There were discrepancies in your reported income

How to Respond to CP11

If You Agree with the Changes

  • • Pay the amount shown by the due date
  • • Use the payment voucher included with the notice
  • • Pay online at IRS.gov/payments
  • • Set up a payment plan if you can't pay in full
  • • Keep records of your payment

If You Disagree with the Changes

  • • Write a letter explaining why you disagree
  • • Include supporting documentation
  • • Send it to the address on your notice
  • • Respond within 60 days of the notice date
  • • Consider seeking professional help

Important Deadlines

Time-Sensitive Response Required

  • • Payment Due: Typically 21-23 days from the notice date
  • • Response Period: 60 days to dispute the changes
  • • Late Payment: Additional penalties and interest will accrue
  • • Missed Deadline: May limit your appeal options

Need Help with Your CP11 Notice?

Don't face the IRS alone. Our experienced tax professionals can help you understand your CP11 notice, evaluate your options, and develop the best strategy for your situation.

We can help you:

Review the IRS calculations for accuracy
Prepare a proper response if you disagree
Negotiate payment plans or settlements
Represent you in communications with the IRS
Reduce or eliminate penalties when possible
Ensure compliance with all deadlines