What this notice is about CP212 is an automatic notice that is sent to filers when they have more than one employer identification number (EIN). We assigned one of these numbers in error but have now consolidated the two numbers. What you need to do Because the CP212 is an informational notice, you do not have to respond. You may want to If you have questions or believe that there was an error in consolidating these numbers, please respond in writing using the space at the bottom of the notice, or call the 877 number at the top of the notice. Tips for next year Ensure that you use the same EIN and name on each form that you file. Reference Tools Publication 1, Your Taxpayer Rights Publication 5027, Identity Theft Information for TaxpayersPDF Full list of tax forms and instructions Need Help? You can authorize someone to contact the IRS on your behalf. See if you qualify for help from a Low Income Taxpayer Clinic. If you can’t find what you need online, call the IRS number at the top of your notice or letter.