TaxResolutionPro
← Back to Notice Library
Warning - Attention Needed

IRS CP11 Notice

Changes to Your Tax Return

IRS made changes that result in additional tax due

What is CP11? The CP11 notice means the IRS made changes to your tax return that result in you owing more money than you originally calculated.

What This Notice Means

The CP11 notice means the IRS made changes to your tax return that result in you owing more money than you originally calculated. This could be due to math errors, incorrect credits or deductions, or other adjustments the IRS made to your return.

Why You Received This Notice

  • 1
    Math errors were found on your tax return
  • 2
    You claimed credits or deductions you did not qualify for
  • 3
    The IRS adjusted your withholding or estimated tax payments
  • 4
    You reported income incorrectly

Important Deadline

You have 21 days to pay the balance due or 60 days to dispute the changes if you disagree.

What You Should Do

  • Review the changes carefully and compare to your original return
  • If you agree with the changes, pay the balance by the due date
  • If you disagree, gather documentation and respond within 60 days
  • Contact the IRS if you need clarification on the changes
  • Keep copies of all correspondence

Resolution Options That May Help

Payment Plan

Taxpayers with steady income who can afford monthly payments

Penalty Relief

First-time penalty situations (clean compliance history)

What NOT to Do

  • Do NOT ignore the notice even if you disagree
  • Do NOT assume the IRS is always correct without verification
  • Do NOT wait until the deadline to respond if disputing
  • Do NOT pay without reviewing if you believe there is an error

Frequently Asked Questions

Can I dispute a CP11 notice?
Yes. If you believe the IRS made an error, you can dispute the changes by responding in writing with supporting documentation within 60 days of the notice date.
What if I cannot pay the amount on CP11?
If you cannot pay in full, you can request an Installment Agreement to pay over time, or explore other resolution options like an Offer in Compromise if you qualify.

Need Help With This Notice?

Use our free tools to understand your options and connect with professionals who can help.

Calculate SettlementFind Best Option

Related Notices

CP22Changes to Your Return - Refund Reduced or Owe MoreCP14Balance Due NoticeCP2000Underreporter Notice

Recommended Next Steps

  • Use our calculator to determine payment options if you owe
  • Consider an Installment Agreement if you cannot pay in full
  • File a formal dispute if you believe the changes are incorrect