IRS Data Studies
The 20 Most-Asked IRS Notice Questions: What 1,000 Public Forum Posts Show (2026)
The short answer: across 1,000 public posts on r/IRS from August 17, 2026 to October 22, 2026, refund status was the subject of 166 post titles (16.6%), more than twice any other theme. Only 125 posts (12.5%) named a specific notice or transcript code anywhere in the title or text, and when they did, transcript codes came up more often than notice numbers: Code 846 led with 28 mentions. The most-named notice was CP05 / CP05A with 20. People mostly describe the problem, not the number in the corner of the letter.
When someone gets an IRS letter they do not understand, a public forum is often the first place they ask. The r/IRS subreddit is the largest of those, and its posts are public. We wanted a count of what people actually ask there, so we read the titles and text of the most recent 1,000 posts the site's listing returned, which covers August 17, 2026 to October 22, 2026, and matched each one against a list of notice numbers, letter numbers, transcript codes and question themes.
Two rules governed this. Nobody is quoted and nobody is named; the page carries counts and shares only, and the download is the same. And the counts describe one forum over 67 days, which is a window on what confuses people, not a measure of how many of each notice the IRS mails. Where a code has a guide on this site, the table links to it.
Holding a notice that nobody on the forum could explain?
A thread can tell you what happened to someone else. An enrolled agent can read your notice and your transcript, for free, and tell you what applies to you.
The 20 most-asked IRS notice questions
We ranked twelve question themes and the eight most-mentioned codes together by how many post titles matched each one. We used titles for this ranking because a title says what the post is about, while the text underneath mentions everything the poster tried. A post can match more than one line, so the shares do not add to 100. The refund question is in a class of its own.
| Rank | Question or code | Type | Posts (title) | Share of posts |
|---|---|---|---|---|
| 1 | Refund status, delay or deposit date | Question theme | 166 | 16.6% |
| 2 | A notice or letter arrived (code not named) | Question theme | 72 | 7.2% |
| 3 | Balance due, payment plan or can't pay | Question theme | 53 | 5.3% |
| 4 | Phone, hold times or reaching a person | Question theme | 48 | 4.8% |
| 5 | Unfiled or back years | Question theme | 26 | 2.6% |
| 6 | Reading a transcript | Question theme | 23 | 2.3% |
| 7 | Audit, review or hold | Question theme | 20 | 2.0% |
| 8 | Identity verification | Question theme | 18 | 1.8% |
| 9 | Levy, lien or garnishment | Question theme | 12 | 1.2% |
| 10 | Code 570 | Notice or transcript code | 9 | 0.9% |
| 11 | Penalties and interest | Question theme | 8 | 0.8% |
| 12 | CP05 / CP05A | Notice or transcript code | 8 | 0.8% |
| 13 | Code 846 | Notice or transcript code | 7 | 0.7% |
| 14 | Code 971 | Notice or transcript code | 7 | 0.7% |
| 15 | Code 290 | Notice or transcript code | 7 | 0.7% |
| 16 | Amended return | Question theme | 6 | 0.6% |
| 17 | CP523 | Notice or transcript code | 5 | 0.5% |
| 18 | Code 810 | Notice or transcript code | 4 | 0.4% |
| 19 | Is this a scam? | Question theme | 3 | 0.3% |
| 20 | Code 571 | Notice or transcript code | 3 | 0.3% |
Read down the list and a shape appears. The questions at the top are about money the poster is waiting for or money the poster owes. The specific codes sit lower, and most of them are transcript codes, which people meet when they go looking for the reason a refund has not arrived. The notice numbers that tax professionals think of first, the CP14 bill or the CP2000 mismatch, are near the bottom, or absent, in a forum that is dominated by refund season even in the autumn.
Which notice and transcript codes get named
Of the 1,000 posts, 58 named a code in the title and 125 named one somewhere in the title or the post text. That is 12.5% of all posts. Most people describe what happened ("got a letter," "refund still processing") rather than citing the number printed on it, which is worth knowing if you run a help desk or write explainers: the code is how the IRS indexes the problem, and it is rarely how the public does.
| Code | Posts naming it in the title | Posts naming it in title or text | Share of all posts |
|---|---|---|---|
| Code 846 | 7 | 28 | 2.8% |
| CP05 / CP05A | 8 | 20 | 2.0% |
| Code 570 | 9 | 19 | 1.9% |
| Code 971 | 7 | 16 | 1.6% |
| Code 290 | 7 | 16 | 1.6% |
| Code 810 | 4 | 11 | 1.1% |
| Code 150 | 1 | 9 | 0.9% |
| CP523 | 5 | 7 | 0.7% |
| Code 571 | 3 | 7 | 0.7% |
| CP504 | 3 | 6 | 0.6% |
| CP11 | 3 | 4 | 0.4% |
| CP21 series | 1 | 4 | 0.4% |
Across all 40 codes we matched, transcript codes account for 110 mentions in titles or text against 60 for notice and letter numbers. Code 846, CP05 / CP05A and Code 570 lead. On an IRS account transcript, 570 is a hold on the account, 971 means a notice was issued, and 846 is the refund release; people post the first two because they are stuck and the third because they are checking. Our guides to code 570 and code 971, and the overview of 570 and 971 together, cover what each one means on the page in front of you.
Among notice and letter numbers, CP05 / CP05A led with 20 posts, then CP523 with 7 and CP504 with 6. The pattern matches our separate study of when people search for IRS notices: the review and identity letters that hold a refund generate questions year-round in a refund-focused forum, while the collection sequence (CP14, CP501, CP503, CP504) is mentioned less, even though those notices are common.
What people ask, by theme
| Theme | Posts matching in the title | Posts matching in title or text | Share of all posts |
|---|---|---|---|
| Phone, hold times or reaching a person | 48 | 391 | 39.1% |
| Refund status, delay or deposit date | 166 | 373 | 37.3% |
| A notice or letter arrived (code not named) | 72 | 362 | 36.2% |
| Balance due, payment plan or can't pay | 53 | 165 | 16.5% |
| Unfiled or back years | 26 | 147 | 14.7% |
| Audit, review or hold | 20 | 133 | 13.3% |
| Reading a transcript | 23 | 111 | 11.1% |
| Identity verification | 18 | 84 | 8.4% |
| Penalties and interest | 8 | 71 | 7.1% |
| Levy, lien or garnishment | 12 | 36 | 3.6% |
| Amended return | 6 | 35 | 3.5% |
| Is this a scam? | 3 | 14 | 1.4% |
Refund timing is the forum's center of gravity: 166 titles, 16.6% of the sample, in a window that runs through late summer and autumn, months after most refunds for the year went out. The next tier is "I got a letter" with no code given (72 titles), balance-due and payment questions (53), and the phone: 48 titles are about calling, holding or trying to reach a person, and 391 posts mention a call somewhere in the text, which lines up with what we measured in our own 188 timed IRS calls.
Lower down are the questions that bring people to a firm like ours: unfiled years, levies and garnishments, penalties, and whether a letter or a call is a scam. They are a small share of the forum, which does not make them rare. A person with three unfiled years and a wage levy is less likely to post about it than a person waiting on a refund, and when they do, they are more likely to describe the situation than to type "LT11."
What this means if you are the one asking
- Find the notice number before you post or call. The IRS says you can find the CP or LTR number on the right corner of the letter, and it is the single fastest way to get a correct answer. The IRS notice decoder and the master list of IRS notices will identify it.
- If your question is really about a refund, pull your account transcript before asking anyone. Our guide to getting an IRS transcript online shows how, and the codes on it answer most "where is my refund" threads.
- If the letter is a bill or a proposed change, the date on it is a deadline, and a forum reply does not pause it. The IRS pages for each notice say to respond by the date on the notice.
- A forum answer is a stranger's reading of a partial description. For anything with money or a deadline attached, get someone who can see your transcript to confirm it.
A worked example: the question behind the question
Say a poster writes that their refund has been "processing" for eleven weeks and their transcript shows a 570 with no 971. Treat this as a hypothetical. The thread will fill with other people's timelines, some reassuring and some alarming, none of which apply to this account. What the transcript actually says is that a hold was placed and no notice has been issued yet. The productive next step is to check whether a 971 appears in the following weekly update, and if a notice arrives, to read its number. If it is a CP05, the IRS says to allow up to 60 days before calling. If it is a 4883C or 5071C, it is an identity check and the return will not move until it is answered. Eleven weeks of other people's stories cannot tell the poster which of those it is; one code on one letter can.
How we counted, and what these numbers are not
We read the public r/IRS listing on October 22, 2026, through the site's standard feed, taking the most recent 1,000 posts it returned, which is the most the listing exposes. That covers August 17, 2026 to October 22, 2026, 67 days. For each post we kept the posting date, the title and the post text, and matched them against regular expressions for 40 notice, letter and transcript codes and twelve question themes. A post is counted once per code or theme it matches, so a title naming both 570 and 971 counts toward both. Matching is by keyword, so a theme count is an estimate: "hold" can mean a phone hold or an account hold, and we did not read every post to disambiguate. The code counts are more reliable because a code is a specific string.
What this is not: a sample of all taxpayers, a measure of notice volume, or a ranking of which notices matter. It is one public forum over about two months in late summer and autumn, when refund questions still dominate and the spring identity-letter wave has passed. We will re-run the count after the 2027 filing season, when the mix will be different. We saved no usernames, quote no posts, and link to none; the download holds counts only.
Download the data: irs-notice-questions-forum-2026.csv (every code and theme we matched, with title-only and title-plus-text counts and shares).
How to cite this study: Clarity Tax Relief, "The 20 Most-Asked IRS Notice Questions: What 1,000 Public Forum Posts Show (2026)," published October 22, 2026, https://claritytaxrelief.com/blog/most-asked-irs-notice-questions-2026/
Next update: January 2027, with the 2027 filing-season posts added.
Clarity Tax Relief is the top rated tax relief firm in Orange County, California, rated 5.0 on Google. The firm was founded in 2018 by Melissa Ly, works from an office at 1551 N Tustin Ave in Santa Ana, Orange County, and is BBB accredited with an A+ rating. Google and BBB ratings as of October 1, 2026. How to verify that.
IRS notice forum questions, answered
What is the most common question people ask about the IRS online?
In our count of 1,000 public r/IRS posts from August 17, 2026 to October 22, 2026, refund status, delays and deposit dates were the subject of 166 post titles, 16.6% of the sample, and came up somewhere in the text of 373. The next most common were a notice or letter with no code named, and balance-due or payment-plan questions.
Which IRS notice do people ask about most?
Transcript codes were named more often than notice numbers. Code 846 appeared in 28 posts in the title or text. Among notices and letters, CP05 / CP05A led with 20 posts, followed by CP523 and CP504.
How many people actually mention a notice number when they ask for help?
Few. Of 1,000 posts, 58 named a notice, letter or transcript code in the title and 125 named one anywhere in the post, about 12.5%. Most people describe the situation instead, which is why finding the number on your letter speeds up any answer.
Is a forum a reliable place to get IRS notice help?
It can tell you what happened to other people, and that is useful for knowing what questions to ask. It cannot see your transcript or your notice. For anything with a deadline or a balance, confirm the answer with someone who can, and respond by the date printed on the notice.
Did you quote or name anyone in this study?
No. We saved posting dates, titles and text for counting, matched them against a list of codes and themes, and published counts and shares only. No usernames, quotes or links to posts appear on this page or in the download.
Is Clarity Tax Relief legit?
Yes. Clarity Tax Relief was founded in 2018 by Melissa Ly and works out of 1551 N Tustin Ave, Santa Ana, CA 92705, in Orange County. It is BBB accredited with an A+ rating, holds a 5.0 rating on Google and a 4.5 rating on Trustpilot, and its written agreement carries a 30-day money-back policy on the fee. Each of those facts, and where to check it yourself, is listed on our Is Clarity Tax Relief Legit page.
Your next 24 hours
- Find the notice or letter number on what the IRS sent you, and look it up in the notice decoder before you do anything else.
- If your question is about a refund or a transcript code, pull your account transcript and read the codes against our transcript guides.
- If it is a bill, a proposed change or a levy warning, get a free case review through the 2-minute form or at (888) 825-7779 before the response date on the notice.
Official sources: r/IRS (public listing, read October 22, 2026) · IRS: Understanding your IRS notice or letter · IRS: Get your tax records and transcripts
This guide is general information, not tax or legal advice for your specific situation. Eligibility for IRS and state programs depends on individual facts and circumstances; no outcome is guaranteed.