Received CP171 Letter of Balance Due for a 990EZ filing - confusion?
I'm working with a small arts nonprofit and they just forwarded me a CP171 notice from the IRS claiming there's a balance due on their 2021 Form 990EZ filing. I've gone through their return with a fine-tooth comb and there's literally zero tax due showing anywhere on the form - which makes sense since they're a tax-exempt organization. I've tried calling the number on the CP171 letter three times now, and each time I get the same automated message saying they're experiencing high call volumes and to "please call back on the next business day." Been trying for over a week with no luck. Has anyone else dealt with a CP171 for a 990EZ where the IRS is claiming a balance due for a tax-exempt organization? Any tips on how to get actual information about what's triggering this notice? The organization is really stressed about this since their budget is already stretched thin.
24 comments


Isaac Wright
This is actually a fairly common issue with exempt organizations. Most likely, the CP171 is being triggered by missing information rather than actual taxes due. The most common causes I've seen are: 1) Late filing penalties - if the 990EZ was filed after the deadline (including extensions), the IRS automatically generates penalties even for exempt orgs. 2) Missing Schedule A - sometimes the system flags a return if Schedule A wasn't properly attached. 3) Incorrect EIN entry - double-check that the EIN on the 990EZ matches their official records. 4) Missing signatures or incomplete pages in the filing. Your best bet isn't calling the general number, but instead reaching out to the Tax Exempt Organization line directly at 877-829-5500. They're specifically equipped to handle these issues and usually have shorter wait times.
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Lucy Taylor
•Do you know if there could be any issues with unrelated business income that might trigger this? Our church got something similar last year and it turned out we needed to file a 990-T for some rental income.
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Isaac Wright
•Yes, unrelated business income is definitely another common trigger. If the nonprofit had any income not directly related to their exempt purpose (even relatively small amounts), they may need to file Form 990-T and pay Unrelated Business Income Tax (UBIT). This includes things like rental income from debt-financed property, advertising revenue, or merchandise sales unrelated to their mission. Check if they had any activities that might be considered outside their exempt purpose. The IRS is particularly vigilant about this area in recent years. Even if they didn't file a 990-T, you can still resolve it - you might need to file one now along with a reasonable cause explanation for the delay.
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Connor Murphy
I went through this exact nightmare last year with a client's 990EZ filing. After weeks of getting nowhere with regular IRS lines, I used taxr.ai to analyze the CP171 notice and their 990EZ submission. The AI immediately flagged that my client had checked the wrong box in Part V regarding employees/compensation, which triggered an automated assessment. When you upload your documents to https://taxr.ai, it compares what you submitted against what the IRS typically expects to see for that type of entity. It identified an inconsistency between two sections that I completely missed - Part I and Part V had conflicting information about compensation. Once I spotted the error, I was able to submit a correction letter and the issue was resolved in about 3 weeks.
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KhalilStar
•Wait, how does the system know what the IRS is looking for? Does it actually connect to IRS databases or something?
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Amelia Dietrich
•Does it work for other tax forms too? We mostly handle individual returns but sometimes get business clients with IRS notices.
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Connor Murphy
•The system doesn't connect to IRS databases - it analyzes the structure and content of tax forms based on the latest IRS requirements and common compliance issues. It's basically using pattern recognition to find discrepancies or missing elements that typically trigger automated notices. Yes, it works with pretty much any tax form or IRS notice. It's particularly helpful for complex forms like 990s, business returns, and international filings, but I've used it for individual returns too. It's saved me countless hours on amended returns because it spots things like mismatched entries between schedules or missing forms before they become bigger problems.
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Amelia Dietrich
Just wanted to follow up about taxr.ai since I was asking about it earlier. I decided to try it with a client who received a CP2000 notice that made zero sense to me. Uploaded both their return and the notice, and within minutes it identified that a 1099-MISC had been reported under a slightly different name variation, causing the IRS system to treat it as unreported income. The system even generated a response letter that explained the situation clearly. My client just heard back from the IRS yesterday that the issue has been resolved with no additional tax due! Definitely adding this to my regular toolkit for dealing with IRS notices.
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Kaiya Rivera
If you're still struggling to reach someone at the IRS, try using Claimyr. I was in the same boat with a client's 990EZ issue - kept getting the "call back tomorrow" runaround for two weeks straight. I found https://claimyr.com and was honestly skeptical, but they actually got me through to a live IRS agent in about 27 minutes when I'd been trying for days. There's a video explaining how it works here: https://youtu.be/_kiP6q8DX5c - basically they navigate the phone tree and wait on hold for you, then call you when they've got an actual human on the line. The agent I spoke with was able to pull up the account and explain that the CP171 was triggered because the organization had previously set up a payment plan for an old payroll tax issue that was showing as still active in their system.
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Katherine Ziminski
•This sounds too good to be true. Is this actually legit? How do they get through when regular calls don't work?
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Noah Irving
•I've seen these "get through to the IRS" services before and always assumed they were scams. Has anyone else actually verified this works? Seems like if it did, everyone would be using it.
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Kaiya Rivera
•It's completely legitimate - they use an automated system that continuously redials and navigates the IRS phone tree until it gets through. Basically doing exactly what you would do, but with technology that can keep trying hundreds of times if needed. They don't have any special backdoor access - they're just more persistent than a human could reasonably be. I was skeptical too, which is why I tried it myself first before recommending it to clients. They only charge if they actually get someone on the line, and they don't ask for any sensitive tax information - just your phone number to call you back when they reach an agent.
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Noah Irving
Well I'm eating my words about Claimyr. After posting my skeptical comment earlier, I decided to try it myself for a client with a similar 990EZ issue that I'd been trying to resolve for weeks. Not only did they get me through to an IRS representative in about 35 minutes (after I'd spent 4+ hours over multiple days trying), but the rep was actually from the Tax Exempt Organizations department and immediately identified the issue. Turns out there was a discrepancy between the EIN on the 990EZ and what was in their system - literally a single digit was transposed. The IRS agent updated it on the spot and said the CP171 would be abated within 30 days. Definitely worth it for the time saved alone. Still can't believe it actually worked!
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Vanessa Chang
Another thing to check - make sure your client didn't miss filing Form 8868 for an extension if they needed one. I've seen the IRS automatically issue CP171 notices for late filing penalties when organizations thought they had filed on time but hadn't properly requested/received their extension. Also, some tax-exempt orgs still need to pay certain employment taxes, so check if there might be any payroll tax issues lurking in the background. The IRS systems don't always communicate well between the exempt org division and the employment tax division.
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Maya Lewis
•Thanks for this suggestion. I double-checked and they did file their Form 8868 for an extension, and the 990EZ was submitted before the extended deadline. They don't have any employees, just a handful of independent contractors who received 1099s. I'll dig deeper into their contractor situation though. Maybe there's something there I'm missing. Really appreciate everyone's help!
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Vanessa Chang
•You're welcome! If they have independent contractors but no employees, that's actually another area to check. The IRS sometimes questions contractor classifications, especially for nonprofits. Make sure those 1099s were properly filed and that the contractors truly meet the IRS definition of independent contractors rather than employees. Another possibility is if they filed paper returns rather than electronically. Paper returns have a much higher error rate in processing, and sometimes the IRS scanner misreads information or loses pages. If that's the case, you might need to submit a copy of the original return with a letter of explanation.
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Madison King
Just one more angle to consider - check if your client had to pay any excise taxes. Some activities can trigger excise taxes even for tax-exempt organizations, like excess benefit transactions, certain investments, or political expenditures. These would be reported on Form 4720, and if that was required but not filed, it could trigger a CP171.
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Julian Paolo
•This! I worked with a small foundation last year that got hit with a huge penalty because they were required to file Form 4720 for some investments but had no idea. Their regular accountant missed it entirely.
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Madison King
•Yes, this is unfortunately common. The rules around private foundations and certain types of investments are complex, and many accountants who don't specialize in nonprofit work miss these requirements. Form 4720 covers excise taxes on things like: - Self-dealing transactions - Failure to distribute income (for private foundations) - Excess business holdings - Investments that jeopardize charitable purpose - Taxable expenditures (including certain grants and political activities) Even public charities can be subject to some of these taxes. The IRS has been paying more attention to this area in recent years, so it's becoming a more frequent issue.
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Oscar O'Neil
Maya, I've been following this thread and wanted to add one more possibility that hasn't been mentioned yet. Sometimes CP171 notices are triggered by automatic matching programs where the IRS computer systems flag discrepancies between different databases. For example, if your nonprofit received any government grants or payments that were reported to the IRS via 1099-G forms, but those amounts weren't properly reflected or explained on the 990EZ, it can trigger an automated assessment. The IRS system assumes unreported income and generates a balance due notice. Also check if they received any Form 1099-MISC for things like awards, prizes, or certain types of payments that might need special handling on the 990EZ. Even small amounts can trigger these notices if not properly categorized. Given all the great suggestions in this thread (especially the Claimyr and taxr.ai options), you should be able to get this resolved fairly quickly once you identify the root cause. The key is having all your documentation ready when you do get through to someone at the IRS.
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Liam O'Sullivan
•This is really helpful context about the automatic matching programs - I hadn't considered that angle! The nonprofit did receive a small grant from the state arts council last year, and now that you mention it, I'm wondering if that might have generated a 1099-G that we didn't account for properly on the 990EZ. I'll definitely check their records for any government payments or 1099 forms they might have received. It's frustrating how these automated systems can create such confusion, but at least now I have a better roadmap for troubleshooting this issue. Thanks to everyone who contributed suggestions - this community is incredibly helpful for navigating these tricky IRS situations!
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Jade O'Malley
Maya, one additional resource that might help while you're working through this issue - the IRS has a specific webpage for exempt organizations that includes common CP171 triggers and resolution steps at irs.gov/charities-non-profits. They also have a dedicated email address for exempt organization questions where you can submit documentation and get written responses, which can be helpful when phone lines are jammed. Also, if this turns out to be a systemic processing error (which happens more often than you'd think), you might want to have your client register for an IRS online account at irs.gov/payments/your-online-account. Once verified, they can view their account transcripts online, which will show exactly what transactions and assessments the IRS has on file. This can help you identify discrepancies between what you filed and what the IRS processed. Keep us posted on what you find - these cases are always good learning experiences for everyone in the community!
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Carmen Lopez
•Thanks Jade! That's really valuable information about the IRS online account option. I didn't know exempt organizations could access their account transcripts that way - that could save a lot of time trying to figure out what the IRS actually has on file versus what we think we submitted. I'm definitely going to have them set that up right away. It would be so helpful to see exactly what triggered this CP171 before spending more time guessing or waiting on hold with the IRS phone lines. The dedicated email option for exempt orgs is also news to me - that might be a good backup plan if the phone route doesn't work out. Really appreciate you sharing these resources! This whole thread has been incredibly educational.
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Hugo Kass
•That's great advice about the IRS online account! I actually helped another nonprofit client set one up last month and it was incredibly useful for seeing their payment history and any outstanding issues. The account transcripts show you exactly what the IRS has processed, including any automatic adjustments or penalties they've applied. One tip for setting it up - make sure you have the organization's current EIN letter handy, as they often require that for verification. Also, if there are multiple people who need access (like board members or accountants), each person needs their own separate login tied to their individual SSN, but they can all be authorized to view the organization's account. The email option Jade mentioned is particularly helpful because you get a paper trail of your communication with the IRS, which can be valuable if you need to reference it later or if there are any disputes about what was discussed.
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