4 Tax Filing Errors That Are Triggering Extra Reviews This Year

In the past, filing taxes was a predictable ritual: mail in the return or e-file it, and wait 21 days for the refund. In 2026, that predictable timeline has broken down for millions of seniors. The IRS has implemented aggressive new fraud filters and modernization mandates that disproportionately affect older filers who stick to traditional habits.

This year, a return that is perfectly accurate can still be pulled from the processing line and frozen for weeks simply because it triggered a “review flag.” These triggers are often automated, sparked by missing digital data points or discrepancies between state and federal reporting. If you are wondering why your “Where’s My Refund?” status hasn’t moved, you likely tripped one of these four new filing alarms.

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

The single biggest cause of delay this year is the IRS’s aggressive push to eliminate paper checks. Under 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 info blank, they simply mailed you a check. Now, that blank field triggers a “soft freeze.” You will receive Notice CP53E in the mail asking you to log in to an online account to provide bank details. If you ignore this notice (or don’t see it), the IRS will eventually release a paper check, but only after a mandatory 6-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 is causing massive processing jams. While the federal threshold was reverted to $20,000 for the 2025 tax year, many states (like Massachusetts, Vermont, Virginia, and Maryland) kept their thresholds at $600.

The Error: You sold $800 of vintage items on eBay. Because this is under the federal $20,000 limit, you didn’t receive a federal 1099-K and didn’t report it. However, your state tax agency received a copy of the form because you crossed the state threshold. The IRS computer system sees this discrepancy between state data and your federal return and flags your return for “underreported income.” Even though the federal law is on your side, the mismatch forces the return into a review queue until the systems reconcile.

3. Clean Energy Credit “Documentation” Gaps

Seniors who claimed the Residential Clean Energy Credit (for solar, windows, or heat pumps) are facing new scrutiny. In 2026, the rules for these credits became strictly “tech-neutral” and now require specific documentation regarding “Qualified Product IDs.”

If you filed a paper return and attached Form 5695 but failed to include the specific manufacturer ID number for your new windows or heat pump, the IRS’s optical scanners will reject the credit. This triggers a correspondence audit (Letter 566-S) asking for physical proof of the installation, freezing your entire refund until you mail in duplicate copies of your invoices.

4. Identity Verification (ID.me) Loops

To combat identity theft, the IRS now requires rigorous identity proofing to verify certain returns or access online tools. This is managed by the third-party service ID.me, which uses facial recognition.

For many seniors, this technology is a hurdle. If your return is flagged for potential identity theft (Notice 5071C), you must pass the ID.me scan to unlock it. Seniors with older phones, shaky hands, or poor lighting often fail the biometric scan, forcing them into a “video chat” queue with wait times exceeding four hours. Until you pass this digital gatekeeper, your refund sits in indefinite limbo.

Watch Your Mailbox

If your refund is delayed, the explanation is likely sitting in your physical mailbox, not your email. The IRS sends notices (CP53E, 5071C) via USPS. Open every piece of mail from the Treasury Department immediately—ignoring a “Request for Information” is the fastest way to turn a delay into a denial.

Did you receive a CP53E notice demanding direct deposit info? Leave a comment below—tell us if you switched or waited for the check!