Understanding your CP01U notice

What this notice is about

We removed the identity protection lock on your tax account, as you requested.

You can now use your taxpayer identification number as either the primary or secondary number on a federal income tax return.


What you need to do

  • Continue to file all required federal income tax returns.
  • Contact us again to lock your account if you don’t have a current filing requirement or don’t expect to have a filing requirement in the near future.

You may want to


Frequently asked questions

Who should I contact if I have more questions about my account related to identity theft?

The Identity Protection Specialized Unit can assist you with questions regarding identity theft related to your account. You can call them at 800-908-4490. You can also find the number on your notice. For all other tax account related questions, contact the IRS help desk at 800-829-1040.

Where can I find more information on preventing identity theft?

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