How To Write A Letter To The Irs Cp11 . Address a return or account problem. When the irs determines that a miscalculation was made when filing a tax return, whether intentional or unintentional, it will often adjust the tax return to reflect the correct values. Sample Letter To Irs Free Printable Documents from londonmedarb.com Each irs notice or letter contains information on how to handle it, often including a specific number for you to call to speak to an irs representative. 1 day agowhat to do if you receive a cp14 letter from the irs. Correct the copy of your tax return that you kept for your records.