You responded on time. You sent the documentation. Then another notice arrived, this one with a bigger balance and a sharper tone.
That usually isn't a mistake on your end. It's what happens when the IRS's automated systems keep running while the people who read your response can't keep up. Understanding that gap is the difference between a notice that closes and one that escalates.
Where the IRS stands heading into 2027
The IRS had a better filing season than many expected. In her June 2026 report to Congress, National Taxpayer Advocate Erin Collins said the agency processed about 139 million individual returns, and most taxpayers received refunds without significant delay. She also noted that taxpayers who needed help often struggled to get it.
The phone lines businesses use tell the story. Through April 18, the IRS answered 51% of calls to its Business & Specialty Tax line, with a 13-minute average hold. On the Installment Agreement/Balance Due line, it answered 31% of calls, and callers waited an average of 45 minutes.
Paper moves slower still. A March 2026 GAO review found the IRS has no plan to reduce its correspondence backlog, which remained above pre-pandemic levels at the end of fiscal 2025. TIGTA separately reported the return-processing backlog jumped 129%.
What the backlog does to your notices
Your response waits while the clock keeps running
Notices are generated by automated systems. Responses are read by people. When a response sits in a queue, the system can move to the next notice in the sequence as if you never replied. The National Taxpayer Advocate has warned that an unprocessed response can trigger an automatic adverse action or a held refund.
Interest keeps accruing
Interest on an assessed balance runs until the balance is paid or abated, no matter how long your response sits unread. A dispute that takes months to resolve can carry months of interest.
Follow-up notices stack up
One issue can generate several notices: the original, a reminder, a balance-due notice, and eventually a collection notice. Without a link between them, teams answer the same issue twice or treat a follow-up as a brand-new problem. For employment tax, quarterly filings mean one unresolved issue can surface across several quarters.
Authorizations take longer
The Taxpayer Advocate lists delays in recording power-of-attorney designations among its 2027 priorities. If your POA isn't on file, your advisor can't call the IRS on your behalf, which puts a slow process on hold entirely.
Penalties get assessed that shouldn't stick
The same report notes that millions of penalties the IRS assesses each year are later abated when taxpayers ask. Slow processing makes those assessments more likely, and it makes a timely abatement request more important.
How to protect your open notices
1. Keep proof of every response
Save the certified mail receipt, fax confirmation, or portal upload confirmation. Record the date and exactly what you sent.
2. Link every follow-up to the original
When a new notice arrives on an issue you've already answered, respond with the original notice number, the date of your earlier response, and a copy of it.
3. Calendar a follow-up date
Set a date for every open response. If you haven't heard back within the window the notice gives, follow up instead of waiting for the next letter.
4. Use the fastest channel available
Upload documents online where the notice allows it. Practitioners should use the Practitioner Priority Service line, which answered 72% of calls with an 8-minute average hold this filing season.
5. Watch the interest math
If a balance is likely owed, paying it can stop interest while you resolve the details. Talk with your tax advisor before you do.
6. Escalate when it stalls
The Taxpayer Advocate Service can help when an issue is significantly delayed or is causing financial hardship. Your documentation from step one is what makes that case.
Make the backlog visible
You can't speed up the IRS. You can make sure nothing on your side slips while you wait.
NOTICENINJA links every notice to the issue behind it, so a follow-up lands with the original instead of starting a new case. Each response is logged with its proof and date, every open item has an owner and a follow-up date, and POA status is tracked alongside the notices it covers. Corporate or employment tax, federal or state, you know exactly where every notice stands.
Know where every notice stands
See how teams track every notice from receipt to resolution.
Book a demoSources: National Taxpayer Advocate, FY 2027 Objectives Report press release (IR-2026-79, June 24, 2026); Bloomberg Government, IRS found to lack plan to shrink taxpayer correspondence backlog (March 2026); Bloomberg Government, IRS watchdog warns of delayed refunds after shutdown, staff drop; Journal of Accountancy, National Taxpayer Advocate report (January 2022). This article is for general information and is not tax or legal advice.