Morton Bookkeeping Services
Unfiled and Late Business Tax Returns
Behind on business tax returns? Start with a clear next step.
When a business tax return is missing—or several years have gone unfiled—it can be difficult to know where to begin. You may be unsure which years need attention, whether your books are complete, or what records a tax preparer will need.
Morton Bookkeeping Services helps small-business owners identify what is missing, organize the records, complete bookkeeping cleanup when needed, and prepare and file late business returns within the agreed scope.
You do not have to have everything figured out before reaching out. We start by understanding where things stand, without judgment.
Help when business tax filings have fallen behind
This service may be a fit when:
- One or more business tax returns are late or missing.
- You are unsure which years were filed or what your previous preparer completed.
- Your bookkeeping is incomplete and needs attention before returns can be prepared.
- You have records in different places and need help understanding what is needed next.
During the initial conversation, tell us about your business, the years involved, the condition of your books, and any notices or deadlines. Being unsure of an answer does not prevent you from starting the conversation. Acceptance and the work required depend on a review of your situation.
National context · Fiscal year 2025
IRS delinquency penalty assessments
Two selected business-return categories. Recorded assessments—not a prediction of your situation.
Number of assessments · Shared scale: 0–600,000
Source: IRS Data Book 2025, Table 4-2, pp. 62–63. Released June 5, 2026; reviewed September 30, 2026.
Recorded October 1, 2024–September 30, 2025, regardless of the return’s tax year. Assessed penalties may later be reduced. Axis labels: k = 1,000.
View the data and interpretation notes
| IRS tax category | Number assessed |
|---|---|
| S corporation income taxes | 540,452 |
| Partnership income taxes | 402,483 |
The two rows above are selected from Table 4-2, column (1), “Number,” under civil penalties assessed. They are not the table’s dollar-amount column or its abatement counts. These totals are not adjusted for the number of filers and do not establish individual risk, outcomes for MBS clients, or a penalty-relief success rate.
Your next step is specific to your business. We start with the missing years, available records, and filing scope rather than assuming what your situation involves.
A clear next step
How getting caught up usually works
We start with the missing years and the records you have. The work is scoped to your situation.
Identify missing or late years
Review the business information, prior returns, and years needing clarification.
Review whether the books are ready
Identify missing records and whether bookkeeping work belongs in the engagement.
- When needed
Complete bookkeeping cleanup
Address agreed cleanup before completing the returns when records are incomplete.
Prepare and file the returns
Within the agreed scope, with your review and required authorization before filing.
- Optional · separate service
Consider monthly bookkeeping
Keep records current going forward through an optional, separately agreed service.
Start with what you know. You do not have to have everything figured out before reaching out. Cleanup is included only when agreed; monthly bookkeeping is optional and separately agreed.
More about each step
1. Identify the missing or late years
We begin with your business information, the years you believe are missing, and any prior returns available. The goal is to identify what can be established from the records and what still needs clarification.
2. Review whether the books are ready
We review available bookkeeping records and identify gaps. Before work begins, we define whether the project involves tax preparation alone or also requires catch-up bookkeeping or QuickBooks Online cleanup.
3. Complete bookkeeping cleanup when needed
If the books are incomplete or unreliable, we address the agreed cleanup before completing the returns. You provide requested records and help clarify unclear transactions.
4. Prepare and file returns within the agreed scope
The tax work uses the records and information supplied, with questions and issues routed for review. You review the returns and provide the required authorization before filing. A filing engagement does not promise penalty relief or a particular taxing-authority response.
5. Consider monthly bookkeeping going forward
After the catch-up work, ongoing monthly bookkeeping can help keep the records current for future tax preparation. It is optional and separately agreed, not an automatic or required purchase in every filing engagement. Tax planning is also separate unless included in the agreement.
When bookkeeping needs to come first
Missing returns and incomplete bookkeeping often need to be addressed together. A tax preparer needs reliable records of what happened in the business—not just a collection of unexplained deposits and expenses.
If months or years of bookkeeping are unfinished, catch-up bookkeeping may be the first step. If transactions are already in QuickBooks Online but the balances, categories, or reconciliations are unreliable, cleanup may be needed as well.
MBS performs bookkeeping and cleanup in QuickBooks Online. Records from another system may need to be exported into usable files and reviewed before the work can be scoped.
Make the first step manageable
Records we may need to review
You do not need to have everything perfectly organized before reaching out. The exact request depends on your business and the years involved.
Business and filing information
- Business entity information
- Prior-year tax returns
- IRS or state notices, if received
- Ownership information
Financial records
- Bank statements
- Credit card statements
- Loan statements
- Sales records
- Merchant processor reports
Accounting and payroll records
- QuickBooks Online access
- Prior accounting records
- Payroll reports
- Contractor payment records
- 1099 information
Have some records, but not all? Tell us what is available and what is missing. These are examples of records we may request—not a requirement to gather everything before the first call.
Use the agreed secure intake process for documents and access. Do not put account passwords or sensitive financial records in a general contact message.
You remain part of the process. Providing the requested documents, answering questions, reviewing returns, and completing filing authorizations are important parts of getting the work completed.
Tell us what you have and what is missing during the call. Sensitive financial documents and identifying information should be provided through the agreed secure intake process, not placed in a general contact message.
Pricing and timing depend on the work involved
A single late return with organized records is different from several missing years with incomplete bookkeeping. Pricing and timing depend on the years involved, the business structure, record quality, account activity, filing scope, and whether cleanup is needed.
We review the situation before providing a project quote or timing estimate. Bookkeeping cleanup is not automatically included in tax preparation. Any related state-return work and additional services need to be part of the agreed scope.
Tell us about an urgent deadline at the outset. A deadline cannot be promised before the records and required work are reviewed.
Filing support is not the same as tax resolution
Preparing missing returns does not automatically include IRS or state representation, audit defense, collection negotiations, or legal advice. We do not guarantee penalty removal, tax savings, or a particular response from a taxing authority.
If you have received a notice or are dealing with an audit or collection matter, raise it during the initial conversation. It requires human review and may call for a separate engagement or referral to an appropriately qualified professional.
Questions about late or unfiled business returns
Can you help with more than one missing tax year?
MBS may help with multiple years, subject to review. The work depends on the records, business activity, and filing issues for each year. We do not set a universal number of years or promise that every case can be accepted.
What if I do not know which returns were filed?
Start with the information and prior returns you have. We can discuss what is known, what records are available, and what needs further review. We will not assume a return was filed—or was not filed—without adequate support.
Do my books have to be finished before I contact you?
No. You can contact MBS before the books are complete. The initial review helps determine whether bookkeeping cleanup needs to be included before the returns can be prepared.
Will filing the missing returns eliminate penalties?
We do not promise that filing missing returns will remove penalties or resolve collection issues. Any penalty or notice question needs review based on the actual circumstances; it is not automatically included in a filing engagement.
Is ongoing monthly bookkeeping required?
Ongoing bookkeeping is a separate scope decision, not something silently included in a catch-up filing project. We discuss whether it is appropriate for your business and confirm what the engagement covers.
What should I bring to the first call?
Be ready to describe the business, the years you believe need attention, where the bookkeeping stands, which records you can access, and whether you have received notices. You do not need to know every answer to begin.
Let’s identify your next step
You do not have to sort through every missing year alone. Start with a conversation about your business and the records available. We will help you understand what needs review, whether MBS is a fit, and how the work would be scoped.
For an overview of our related services, explore Bookkeeping, Taxes & More.