Tax notice response pack: draft letter and checklist

Look up a notice, free

Pick a code, or paste the heading of the notice. Matching happens on this page. Nothing is sent to us or to any tax agency.

This free lookup explains the same 20 notices below. Use it before you pay for the $39 pack.

What the $39 pack is

The $39 pack is one private web page, built after payment and not shared with anyone else, for the one notice code and position (agree, disagree, agree in part, or ask for more time) picked at checkout. It carries:

• The notice, explainedThe notice’s name and what it means, in plain words.
• The deadline ruleStated the way the agency’s own page for that notice states it, plus a reminder to use the date printed on your own notice.
• A draft reply letterFilled from a template, not written by a model. The notice, its name, the deadline rule and the position you picked are filled in already; the facts only you have — your name, address, the date on your notice, the tax year, the amount, your reason and a phone number — are editable blanks you type into and print. Nothing you type leaves your browser.
• An enclosure checklistThe papers that notice usually needs, as checkboxes.
• The source linkA link to the agency page (IRS, or the state tax office) the notice was drawn from, and a plain note if we have not re-checked this notice against that page since the pack was written.

It is a draft you finish, not a filed reply, and not legal or tax advice. The agency’s own page governs.

All 20 notices this covers

• CP2000 — Underreporter proposed changesThe IRS compared your tax return to forms other people sent in, like a W-2 or 1099. The numbers do not match, so the IRS proposes you owe more tax. This is not a bill yet. You can agree, disagree, or agree in part.Read the IRS page
• CP2501 — Underreporter inquiryThe IRS saw a mismatch between your return and other reports, and is asking questions first. It has not yet proposed a new tax amount the way a CP2000 does. Answer with records so they can close the question or send a later notice.Read the IRS page
• CP3219A — Notice of Deficiency (90-day letter)The IRS says you owe more tax and is giving you a set window to go to Tax Court if you disagree. If you miss that window, the amount can be assessed and billed. This is a serious legal deadline, not a reminder letter.Read the IRS page
• CP14 — Balance dueThe IRS says your return was processed and you still owe tax, penalties, or interest. This is a bill. You can pay, set up a plan, or explain why the amount is wrong.Read the IRS page
• CP501 — First reminder of balance dueThe IRS already billed you and you have not paid the full amount. This is the first reminder. Interest keeps adding. Pay, dispute the amount, or ask for a payment plan.Read the IRS page
• CP503 — Second reminder of balance dueThe IRS has reminded you more than once that a balance is still open. If you ignore it, the next letters can talk about levies. Do not wait for a levy notice to answer.Read the IRS page
• CP504 — Intent to levy / Notice of intent to seize propertyThe IRS is warning that it may take state tax refunds or other property if you do not pay or appeal. This is past a simple reminder. You still have a short window to pay, set a plan, or appeal.Read the IRS page
• LT11 — Final Notice of Intent to Levy (Letter 1058)This is the final levy warning. It also tells you that you can ask for a Collection Due Process hearing. If you miss the hearing window, the IRS can levy pay, bank accounts, or other property. People also know this letter as Letter 1058.Read the IRS page
• CP11 — Math error, you oweThe IRS changed your return because of a math or clerical error and says the change means you owe money. You can accept the change or ask them to undo it. If you do nothing, the extra amount stands.Read the IRS page
• CP12 — Math error, refund changedThe IRS changed your return because of a math or clerical error. The change usually lowers the refund they will send, or changes it to a small bill. You can accept it or ask them to undo the change.Read the IRS page
• CP22A — Data processing adjustment, balance dueThe IRS changed your account after processing and now says you owe a balance. This can follow a later adjustment, not only a math error on the day they typed the return. Check the change against your records before you pay.Read the IRS page
• CP23 — Estimated tax discrepancyThe IRS thinks the estimated tax payments you claimed on your return do not match what they have on file. That can create a bill even when the rest of the return is fine. Compare your cancelled payments or bank records to the notice.Read the IRS page
• CP49 — Overpayment applied to other debtsYou were due a refund, but the IRS used it to pay another federal or state debt, or certain other legally collectible debts. This letter is usually telling you what happened, not asking you to file a new return. If the offset is wrong, you still need to write.Read the IRS page
• CP75 — Audit of refundable credits (including EITC)The IRS is holding or reviewing a refund because it wants proof of credits you claimed, often the earned income credit or similar credits. Send the documents they list. If you send nothing, they can deny the credit.Read the IRS page
• Letter 5071C — Identity verificationThe IRS wants you to prove you are the person who filed the return, because something looked like identity theft or a suspicious filing. Until you verify, they will not finish processing. Use the method the letter names. Do not send your full Social Security number in a random email.Read the IRS page
• FTB 4600 — Notice of Proposed AssessmentCalifornia's Franchise Tax Board proposes that you owe more state tax. It is the state analog of a federal underreporter or proposed-assessment notice. You can agree, protest by the deadline, or pay.Read the California Franchise Tax Board page
• DTF-948 — Statement of Proposed Audit ChangesNew York State tax says an audit would change your return and proposes a new amount. You can agree, disagree, or agree in part. If you do nothing, the state can bill the proposed amount.Read the New York State Department of Taxation and Finance page
• CP2566 — Substitute for Return proposed amountThe IRS thinks you were required to file and did not, so it built a substitute return from the reports it has. That proposed return usually ignores deductions you could have claimed. File your own return or explain why you did not have to file.Read the IRS page
• CP2100 — Missing or incorrect taxpayer identification numbersIf you file 1099 forms, the IRS says some names or taxpayer numbers do not match their records. You may have to send backup-withholding notices to those payees and, later, withhold tax. This is a payer notice, not a bill for your own income tax.Read the IRS page
• Letter 525 — Examination reportAn IRS examiner finished a review and is sending the proposed changes in a report. You can agree and sign, disagree, or ask for a conference. If you disagree and do not answer, a later notice of deficiency can follow.Read the IRS page

How it is made, and what it is not

There is no separate file behind this page: the whole of what we hold is printed on this page, as the free lookup of all 20 notices above. The $39 pack adds the draft letter, the editable blanks and the enclosure checklist for the one notice and position you pick.

No part of the letter is written by a model. It is a fixed template, filled with the notice's own facts and the position you pick, plus the blanks that only you can fill in. The checklist and the deadline rule come from the same notice data, not a fresh reading of your actual notice.

These 20 notices are 18 from the IRS and 2 from state tax offices (California, New York). We read each one against its agency’s own page once, when this pack was written. As of today, 20 of 20 have not been re-checked against that page since; each one says so on its own private page, next to the source link.

What arrives is a draft you finish, not a filed reply, and it is not legal or tax advice. If the letter and the agency’s page ever disagree, the agency’s page is right — use the response date printed on your own notice, not a date on this page.