Getting IRS Notice LT26 can feel overwhelming—especially if you’re not sure what the IRS thinks is missing. The good news is that LT26 is usually solvable with a clear plan and prompt action.
This letter generally means the IRS believes you have one or more required tax returns that haven’t been filed, and it’s asking you to respond quickly. It often follows an earlier “missing return” notice.
IRS Notice LT26 At a Glance
- Notice purpose: Return delinquency (the IRS believes a return is missing)
- Common backdrop: Often follows earlier outreach about unfiled returns (commonly CP59 or a similar reminder)
- Typical urgency: The notice usually asks you to respond within a short window (often around 10 days from the notice date)
- What the IRS wants: File the missing return(s), or contact the IRS if you disagree or already filed
- What can happen if ignored: The IRS may prepare a “substitute for return” using the income documents it has on file, which often results in a higher tax than a correctly filed return
IRS Notice LT26 Explained, Part by Part
1) The main message of IRS Notice LT26 : file your missing returns
LT26 is straightforward. It tells you the IRS still does not have the return(s) it believes you are required to file and asks you to submit them.
2) What the IRS wants you to do “immediately” with IRS Notice LT26
This section typically lists action items such as:
- File the missing return(s) by the deadline shown
- Pay what you can now if you expect to owe
- Call the IRS if you already filed or believe you do not have a filing requirement
- Review your account information if you need more details
3) The IRS Notice LT26 information box
Many versions of LT26 include a small box that points you to the IRS’s official notice explainer page. It usually repeats the main instructions from the letter.
4) Summary table of missing tax returns
A key part of LT26 is a year-by-year (or period-by-period) list of what the IRS believes is missing. You’ll typically see:
- Tax period ending: The last day of the period the IRS says is unfiled
- Form number: The form the IRS expects (for example, an individual or business return)
- Name of return: The type of return the IRS thinks you must file
Important: the IRS can be wrong—returns can be misapplied, processed late, or the filing requirement may not apply to you.
5) What the IRS warns may happen next
LT26 often explains that delays can lead to:
- More penalties and interest as time passes
- IRS-prepared returns (Substitute for Return/SFR) that may not include deductions or credits you’re entitled to claim
- Escalation in collections activity once the IRS believes it has a tax assessed
6) IRS contact and general help info
The notice typically includes phone and mailing information, plus directions for finding forms and general guidance.
7) Taxpayer rights and other assistance
LT26 commonly references taxpayer rights and resources such as the Taxpayer Bill of Rights, IRS Publication 1, Low-Income Taxpayer Clinics, and the Taxpayer Advocate Service.
When the IRS Sends Notice LT26
LT26 is most often triggered when:
- The IRS received income information about you (such as W-2s or 1099s) but does not see a filed return for the year.
- The IRS already attempted to contact you about the missing return(s), and you didn’t respond.
- The account has been routed through IRS processes designed to pursue unfiled returns before the IRS takes the next step of creating its own tax assessment.
What You Should Do If You Receive LT26
Step 1: Verify exactly what the IRS says is missing
Start with the summary table on the notice. Write down each tax year/period and each form listed. Then compare that list to your records.
If you already filed, gather proof (accepted e-file confirmation, certified mail receipt, or a copy of what was submitted). If you believe you were not required to file, be prepared to explain why.
Step 2: Collect records and rebuild the return correctly
If documents are missing, you may need to reconstruct income and deductible expenses using employer/payor records, bank statements, bookkeeping files, and IRS wage and income information.
This is where many taxpayers get stuck—especially if the return is several years old or involves self-employment, rental property, or a small business.
Step 3: File the missing return(s) before the IRS does it for you
In most cases, filing an accurate original return is far better than letting the IRS create a substitute return based only on what it can see. IRS-prepared substitutes often overstate tax because they generally don’t include the deductions and credits you would normally claim.
Also note: there are time limits on claiming refunds for older years, so waiting can eliminate money you may otherwise be entitled to receive.
Step 4: If you owe after filing, pick a resolution strategy
After the return is filed, you may still have a balance due. Common next steps include:
- Paying in full if possible
- Setting up an installment agreement (payment plan)
- Requesting penalty relief when the facts support it
- Exploring other resolution options when full payment isn’t realistic
Penalties matter, too. The IRS has separate penalties for filing late and paying late, and they can add up quickly. A CPA can help you understand what applies in your situation and whether you have any relief options based on IRS rules.
Why Work With a CPA Firm, Not Just a Tax Relief Company
LT26 situations are often more than “just calling the IRS.”They usually require:
- Preparing delinquent returns accurately (sometimes multiple years)
- Ensuring the IRS applies filings to the correct tax periods
- Reducing the risk of an IRS substitute return becoming the “official” number
- Building a realistic, compliant plan to resolve any balance due
Corridor Consulting CPAs is a licensed CPA firm—meaning your case is handled by tax professionals who can combine resolution work with proper tax preparation and long-term compliance support. That’s different from national call-center style tax relief companies whose business model often focuses on sales first. You need a CPA Firm.
How Corridor Consulting CPAs Can Help With LT26
For taxpayers in Cedar Rapids, Eastern Iowa, and across the U.S., we can help by:
- Reviewing the LT26 and confirming what’s actually missing
- Preparing and filing delinquent returns with supporting documentation
- Addressing substitute-for-return risk and correcting misapplied filings
- Mapping out the next steps if a balance is owed (payment plan, relief review, and compliance strategy)
Take the First Step Toward IRS Tax Relief
If you received IRS Notice LT26, the best move is to respond with a clear filing plan—before the IRS fills in the blanks and starts collecting based on an estimate.
If you want steady, transparent tax relief help from a Cedar Rapids CPA team, Corridor Consulting CPAs can help you get compliant and move forward with confidence.
