Understanding Your CP518 Individuals Notice

What this notice is about

Final reminder notice. We still have no record that you filed your prior tax returns.


What you need to do

  • File your tax return immediately or explain to us why you don't need to file.

  • Complete Form 15103, Form 1040 Return Delinquency (PDF), included with your notice to explain:
    • Why you're filing late.
    • Why you don't have to file.
    • That you’ve already filed.
  • Detach notice stub, mail it with your tax return and completed Form 15103 using the envelope provided.


If we don't hear from you

  • We may determine your tax for you, and penalty and interest may continue to accrue.
  • If you are owed a refund for the current tax year, or any prior year, it may be delayed because of this unfiled return.

You may want to


Frequently asked questions

What should I do if I disagree with the notice?
Call us at the toll-free number on the top right-hand corner of your notice. Please have your notice and account information available when you call. If you prefer, you can write to us using Form 15103.

What should I do if I've just filed my tax return?
You don't have to do anything if you filed your tax return within the last 8 weeks.

What should I do if I didn't file my tax return or it's been more than 8 weeks since I filed it?
Complete Form 15103 included with your notice. Check the name, Social Security number, and tax year on your notice. Make sure they match the name, number, and year on the return. Mail us a signed, dated copy of the tax return with Form 15103.

What if I want to file prior year returns electronically?
We accept prior year returns electronically for the two most recent prior years. However, you must locate an e-File provider who offers the service to do so.

What happens if I can't pay the full amount I owe when I file my return?
You can request a payment plan with us when you can't pay the full amount you owe.


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