4 tax return mistakes that will lead to additional assessments this year

4 tax return mistakes that will lead to additional assessments this year

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In the past, filing taxes was a predictable ritual: mail or email the return and wait 21 days for the refund. In 2026, that predictable timeline has been cut short for millions of seniors. The IRS has implemented aggressive new fraud filters and modernization mandates that disproportionately affect older filers who cling to traditional habits.

This year, a return that is perfectly accurate can still be taken off the processing line and frozen for weeks simply because a “review flag” was triggered. These triggers are often automated, caused by missing digital data points or discrepancies between state and federal reporting. If you’re wondering why your “Where’s my refund?” status has not changed, you have probably activated one of these four new archive alarms.

1. The “Paper Check” Lockout (Notice CP53E)

The biggest cause of the slowdown this year is the IRS’s aggressive push to phase out paper checks. Under the new “Modernizing Payments” protocols, the IRS is temporarily freezing refunds for filers who do not provide direct deposit information.

In the past, if you left the bank information blank, they would simply send you a check. Now that empty field causes a ‘soft freeze’. You will receive the CP53E notice by email asking you to log into an online account to provide your bank details. If you ignore (or don’t see) this notice, the IRS will eventually release a paper check, but only after a mandatory six-week delay. For seniors who don’t trust online banking, this new rule effectively adds a month and a half to their wait time.

2. The 1099-K “state vs. federal” mismatch

Confusion over the 1099-K reporting threshold causes massive processing disruptions. While the federal threshold was rolled back to $20,000 for tax year 2025, many states (such as Massachusetts, Vermont, Virginia, and Maryland) kept their thresholds at $600.

The mistake: You sold $800 worth of vintage items on eBay. Because this is below the federal limit of $20,000, you did not receive a federal 1099-K and did not report it. However, your stands The tax authorities have received a copy of the form because you have exceeded the state threshold. The IRS computer system sees this discrepancy between state records and your federal return and marks your return for “underreported income.” Even if federal law is on your side, the mismatch forces the return to a review queue until the systems reconcile.

3. Shortcomings in the “documentation” of clean energy credits

Seniors who have claimed the Residential Clean Energy Credit (for solar energy, windows or heat pumps) are being scrutinized again. In 2026, the rules for these credits became strictly “technology neutral” and now require specific documentation regarding “qualified product identifiers.”

If you filed a paper return and attached Form 5695, but did not include the specific information Manufacturer ID number for your new windows or heat pump, the IRS optical scanners will deny the credit. This will trigger a correspondence audit (letter 566-S) requesting physical evidence of the installation, which will freeze your full refund until you send duplicate copies of your invoices.

4. Identity verification (ID.me) loops

To combat identity theft, the IRS now requires strict identification to verify certain returns or access online tools. This is managed by the external service ID.me, which uses facial recognition.

For many seniors, this technology is an obstacle. If your return is flagged for possible identity theft (Notice 5071C), you will need to pass the ID.me scan to unlock it. Seniors with older phones, shaky hands or poor lighting often fail the biometric scan, leaving them in a “video chat” queue with wait times of more than four hours. Until you pass this digital gatekeeper, your refund will remain in limbo indefinitely.

Keep an eye on your mailbox

If your refund is delayed, the explanation is likely in your physical mailbox and not in your email. The IRS sends notices (CP53E, 5071C) via USPS. Open any piece of Treasury mail immediately; Ignoring a ‘request for information’ is the fastest way to turn a delay into a denial.

Have you received a CP53E notice requesting direct deposit information? Leave a comment below: tell us if you switched or waited for the check!

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