CP2566 Notice

The CP2566 is an IRS notice informing you that the IRS has prepared a Substitute for Return (SFR) on your behalf because you did not file a required tax return. The IRS used income data reported by third parties to calculate your tax liability, which is typically higher than what you would owe on a properly filed return.
Why Did You Receive This Notice?
You received a CP2566 because you did not file a federal income tax return for the tax year listed on the notice. The IRS collected income information from employers, banks, and other institutions through W-2s and 1099s, and used that information to calculate a tax return on your behalf. This IRS-prepared return is called a Substitute for Return (SFR) and it typically does not include any deductions, exemptions, or credits beyond the standard deduction.
What Does this Mean for You?
The CP2566 means the IRS has calculated a tax liability for you based on third-party reported income only — without the benefit of deductions, filing status adjustments, or credits you might have claimed. The resulting balance is what the IRS believes you owe. If you do not respond, the IRS may begin collection action on this SFR-based balance.
What Happens If You Ignore It?
Your Options
- File your actual tax return: Filing your own return for the tax year listed will supersede the SFR. Your properly filed return will include all deductions, credits, and correct filing status — almost always resulting in a much lower tax liability than the SFR.
- Respond if you don't owe: If you review the IRS's SFR calculation and believe no tax is owed — for example, if the income was below the filing threshold — respond in writing with an explanation.
- Accept the SFR: If the SFR is accurate and you agree with it, you can pay the balance and move on. This is rarely the best option, as filing an actual return is almost always more favorable.
Step-By-Step: What To Do Next
Step 1: Read the CP2566 and note the tax year and the balance the IRS calculated on the Substitute for Return.
Step 2: Gather your income documents (W-2s, 1099s) for that tax year. Order IRS transcripts at irs.gov if needed.
Step 3: Prepare your actual tax return for that year, including all deductions, credits, and correct filing status.
Step 4: File the return as soon as possible. Prior-year returns generally must be filed by paper mail.
Step 5: Once your return is processed, the IRS will update your account with the corrected, lower tax liability.
Step 6: Pay any resulting balance or set up a payment plan if needed.
Can You Handle this Yourself?
Filing the missing return is the key action, and it's something you can do on your own with tax software that supports prior-year filing. The single most important thing to understand is that the IRS's SFR is almost always worse for you than a return you file yourself — don't let the SFR stand if you can file your actual return.
Expert Insight From Rockwater Tax
At Rockwater Tax, we help clients resolve CP2566 situations regularly. In almost every case, the client's actual tax return — with proper deductions, credits, and filing status — results in a significantly lower liability than the IRS's Substitute for Return. We've seen cases where the SFR showed $25,000 owed and the actual return reduced that to near zero. File your return as quickly as possible.
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FAQ
Q: What is a Substitute for Return (SFR)?
A: A Substitute for Return is a tax return prepared by the IRS on your behalf when you fail to file. It uses income reported by third parties but typically does not include deductions or credits, resulting in a higher-than-necessary tax liability.
Q: Can I file my own return after the IRS prepares an SFR?
A: Yes. Filing your actual return will supersede the SFR and is almost always in your financial interest. The IRS will adjust your account to reflect your actual return.
Q: Is the balance on the CP2566 accurate?
A: The income figures may be accurate, but the balance is almost certainly higher than what you would actually owe on a properly filed return. File your own return to get the correct amount.

