The IRS did not get weaker when it lost roughly a quarter of its workforce. It got faster.
That sentence sounds backwards, because fewer people should mean fewer notices. Instead, the opposite happened. IRS Commissioner Frank Bisignano told the Senate Finance Committee that enforcement revenue rose twelve percent this fiscal year, in just the first five months. In fact, the agency pulled that off with about a quarter fewer employees than it had the year before.
I keep hearing the same question from clients right now. If the IRS has fewer agents, why am I suddenly getting more letters? The answer lives inside a piece of software, not a person. That is exactly why 2023 tax returns deserve your attention this month, not next spring.
The Machine Behind the Mailbox
Here is what actually changed. A March 2026 report from the Government Accountability Office confirmed something striking. The IRS now runs 126 active artificial intelligence applications across audit selection, fraud detection, and compliance scoring. Back in August of 2022, that number was ten.
That is not a modest upgrade. In other words, it is a different agency wearing the same logo. These systems scan millions of returns at once. First, they cross-check every number against W-2s, 1099s, K-1s, and payment processor data. Then they flag mismatches faster than any team of humans ever could.
Most of what gets flagged never becomes a field audit with an agent across the table. Instead, it becomes a CP2000 notice, generated automatically through the IRS’s Automated Underreporter Program. According to the agency’s own fiscal year 2024 activity report, correspondence exams, the mail-based kind, made up nearly 78 percent of everything closed that year. Field exams made up the rest, and yet they generated far more money per case. On average, they recommended roughly thirteen times more additional tax than correspondence audits did. In short, the letters are common, and the dollars attached to them keep climbing.
I wrote about this shift toward automated scanning in The IRS Has a Clock. The pattern has only picked up speed since then. If you have not read that piece, now is a good time to revisit it. The clock I described there is about to matter for one specific tax year.
Why 2023 Is the Year Everyone Should Watch
Under IRC Section 6501, the IRS generally has three years to assess additional tax. That clock starts on the date you filed your return, or its due date, whichever comes later. Miss that window, and in most cases the door closes for good.
Consider, for example, a 2023 return filed on time in April of 2024. That window shuts on April 15, 2027. File on extension and submit in October of 2024 instead, and you buy until October 15, 2027. Either way, the countdown is shorter than most business owners assume, and it is already running quietly in the background.
I have spent a good chunk of this year comparing notes with colleagues who spent decades inside the agency as revenue agents. Consistently, their read matches mine. After the disruption of the pandemic years, the IRS deliberately gave taxpayers room to catch up on filings and cash flow. Now, that grace period is ending. Combine a shrinking statute window on 2023 returns with a scanning system that never sleeps, and the result is predictable. Dormant files get pulled back out before they expire for good.
Nobody at the IRS issues a press release announcing which tax year it is prioritizing. However, the mechanics of the statute of limitations make the timing obvious enough on their own. Simply put, a file that has to move before a deadline moves faster than one that does not.
What a CP2000 Actually Is
Let me pause here, because this term scares people more than it should. A little clarity goes a long way.
A CP2000 is not a bill. It is not technically an audit either. It is a proposed adjustment, triggered when the income, payments, or credits on your return do not match what a third party reported separately. For example, picture a 1099 that never made it onto your Schedule C, or a K-1 that showed up after you had already filed.
You generally get thirty days to respond, sixty if you live outside the country. Ignore that window, and the IRS treats your silence as agreement. That is close to the worst outcome for a mismatch with a perfectly reasonable explanation. Even a correct return can trigger one of these notices. A late-arriving corrected 1099, a K-1 posted after filing season, or income reported under a slightly different name can all create a false alarm. Admittedly, the notice looks intimidating on the page. Often, though, the underlying fix takes five minutes, but only if someone responds the right way and inside the deadline.
Ask me sometime about the client whose “unreported income” turned out to be his own S-Corp distribution, reported twice by two different processors. Honestly, that one still makes me laugh. It took forty-five minutes to untangle, and it would have taken him weeks on his own.
Who the Software Flags First
Not every business owner faces equal odds here. It helps to know where the matching system tends to look hardest.
Gig income and 1099-K mismatches sit near the top of that list. If you sold through multiple platforms or payment processors in 2023, the IRS received several separate reports of your income. As a result, it expects your Schedule C to reconcile with all of them at once. Partnership and S-Corp owners face a similar issue with K-1s. Those forms sometimes arrive months after the original deadline and never make it onto an amended return.
Worker classification is another frequent trigger. Treating someone as a contractor, when the facts point toward an employee relationship, creates exactly the kind of mismatch the software is built to catch. So does an S-Corp salary that looks disconnected from the profit the business actually generated. Of course, none of these issues automatically mean trouble. They simply mean your file is more likely to surface when the system runs its next pass. A 2023 return with any of these traits deserves a second look now, before the statute window closes, rather than after a notice forces the issue.
Documentation Beats Everything Else
One habit separates a business owner who resolves a notice calmly from one who spirals. It is documentation that already exists before anyone asks for it.
Reconcile your 1099s against your books throughout the year instead of scrambling every April. Hold onto mileage logs, receipts, and bank statements for at least the three-year assessment window. Keep them longer if your return involves real estate, digital assets, or anything that could trigger the six-year rule for a substantial income omission. If you run payroll through an S-Corp, make sure your reasonable salary can survive a second look. That particular issue keeps showing up on IRS enforcement priority lists, year after year.
Admittedly, none of this advice is glamorous. Still, it is the difference between a notice resolved with one clean letter and one that spirals into a drawn-out examination that eats your winter.
If your 2023 books are anything less than tidy right now, this is the moment to fix that, instead of waiting for a notice to force the issue.
A CP2000 is not a verdict. It is an opening argument, and someone needs to answer it on your behalf.
Don’t Answer the Letter Alone
I have written before about why self-representation in front of the IRS is a bad idea. Everything happening right now only strengthens that case. When you respond to an automated system without a plan, you are negotiating with a machine. It never gets tired, never second-guesses itself, and treats every unclear answer as a reason to dig further.
A client of mine received a CP2000 last year proposing more than eleven thousand dollars in additional tax on a 2023 return. A corrected 1099 that arrived after filing had triggered it. Left alone, that notice would likely have become a paid bill. Instead, a documented response tied the correction back to the original filing, and the adjustment dropped to a few hundred dollars in interest. In the end, same facts, completely different outcome, because someone who handles these daily wrote the reply. He did not have to handle it once and hope for the best.
That is the whole story here. The IRS is not becoming more dangerous because its agents got smarter. Rather, it is becoming more relentless because its software never stops checking. Meanwhile, the statute of limitations on your 2023 return will not pause while you get organized. For the fuller picture of how we got to this point, I covered the earlier uptick in audit activity here.
The clock on your 2023 return is already moving. How you spend the months ahead of it will decide something important. That year will either close itself out quietly, or it will turn into something far more expensive than it ever needed to be.
That quiet ending is exactly what I want for every client’s 2023 file, and it starts with treating this year differently than the ones before it.
Welcome to the New Age of Accounting. Let’s begin.
P.S. If you found this article helpful, you’ll love my new book S-Corp Mastery: How Smart Business Owners Maximize Tax Savings & Build a Lasting Legacy. It’s now live and available in a sleek, easy-to-read PDF version. Grab your copy here
Chris is the Managing Partner at Weston Tax Associates, a best-selling author, and a renowned tax strategist. With over 20 years of expertise in tax and corporate finance, he simplifies complex tax concepts into actionable strategies that drive business growth. Originally from Sweden, he now lives in Florida with his wife and two sons.
