If you’ve received a 12C letter from the IRS, it means your tax return can’t be processed until additional information is provided. Officially referred to as IRS Letter 12C or IRS LTR 12C, this notice is commonly issued when a taxpayer omits a required form, enters conflicting information, or fails to provide documentation tied to health insurance credits or other tax benefits. While not a notice of audit or collection, it still requires immediate attention.
At The Law Offices of Nick Nemeth, we assist taxpayers in Dallas, Fort Worth, and Frisco in responding accurately and promptly to IRS letters like Letter 12C, helping them avoid delays, denials, or lost benefits.
Why Did You Receive IRS Letter 12C?
Here are common reasons for receiving the IRS Notice 12C:
- Missing Form 8962 – Often required for reconciling Premium Tax Credits claimed on the return.
- No Form 1095-A Attached – The IRS needs this to verify your enrollment through the Health Insurance Marketplace.
- Discrepancy in Reported Income – Mismatches in information reported on your return versus what the IRS has received.
- Incomplete Return – If key schedules or documents are missing, the IRS will not process the return until they’re submitted.
- Inconsistent Filing Status or Dependent Claims – Errors in claiming dependents or filing jointly versus separately.
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What the IRS Expects from You
The Letter 12C will specify what is missing and instruct you on how to respond. You will typically be asked to:
- Complete and return a specific form (like Form 8962)
- Provide supporting documents (like Form 1095-A)
- Clarify inconsistencies in your return
- Submit all materials by a specific deadline (usually 20–30 days from the date of the letter)
Failing to comply may lead to the rejection of your return or loss of tax benefits.
Consequences of Ignoring IRS Letter LTR 12C
While Letter 12C is not a collection notice, ignoring it can lead to significant inconveniences, including:
- Refund Delays – The IRS won’t issue a refund until the return is complete.
- Loss of Credits – Premium Tax Credits and other benefits may be disallowed.
- Return Rejection – Your return could be considered invalid.
- Additional Notices – Continued inaction can escalate IRS scrutiny.
Additionally, unresolved discrepancies may lead to further questioning or future audits.
How to Respond to IRS Letter 12C
- Read the Letter Thoroughly – Understand what’s missing and what is required.
- Gather the Requested Documentation – Retrieve missing forms, schedules, or corrections.
- Attach Letter 12C to Your Response – Always include a copy of the original IRS letter.
- Mail or Upload Your Response – Follow the instructions exactly—whether submitting by mail or through IRS’s online system.
- Meet the Deadline – Make sure your response is submitted within the window provided.
- Keep Copies of Everything – Retain copies of what you send for your records.
- Follow Up If Needed – If you don’t receive confirmation or updates, be proactive.
Turn Your IRS Notices into a Thing of the
Past with Us!
Don't let IRS notices cast a shadow over your life. It's time to step into the light and regain control by effectively addressing your IRS tax issues. To learn how we can guide you through this process, reach out to The Law Offices of Nick Nemeth for a FREE no-obligation consultation. We're dedicated to helping you transform your IRS notices from a source of worry into a resolved matter.
How The Law Offices of Nick Nemeth Can Help
Responding to the 12C letter from the IRS incorrectly can cost you time and money. Our experienced team offers:
- Thorough Review of Your Case – We identify exactly what the IRS needs.
- Assistance with Form Preparation – Whether it’s Form 8962, 1095-A, or any other documentation.
- Deadline Management – We ensure your response is filed on time.
- IRS Correspondence Handling – We communicate directly with the IRS on your behalf.
- Ongoing Tax Compliance Support – To prevent similar issues in future filings.
We’ve helped countless taxpayers in Dallas, Fort Worth, and Frisco resolve issues related to IRS Letter LTR 12C and ensure smooth processing of their returns.
Tips to Prevent Receiving a 12C Letter
Avoiding IRS Letter 12C is often about careful preparation. Here’s how:
- Use Professional Tax Services – Professionals know which forms are required and when.
- Double-Check Health Insurance Information – Especially if you’ve purchased coverage via the Marketplace.
- Keep Records Organised – Maintain copies of forms like 1095-A and 8962 year-round.
- Review Before You File – Don’t submit your return until you’re sure it’s complete.
- Use IRS Tools – The IRS provides resources and checklists to verify return completeness before submission.
Common Issues That May Trigger a 12C Notice
In our experience, these scenarios often lead to Letter 12C:
- Incorrect or missing Advance Premium Tax Credit reconciliation
- Conflicting information about dependent coverage
- Submitting the wrong version of a form (e.g., 8962 vs. 1095-B)
- Claiming Marketplace coverage when not enrolled
- Entering estimated income that doesn't match verified third-party records
A thorough pre-filing check or expert filing service can prevent most of these issues.

Let Us Own Your IRS Tax Worries!
Stop spending sleepless nights, wondering what might happen next. It is time to take action and reclaim your future by resolving your IRS tax debt problem for good. To learn more about how we can help, get in touch with The Law Offices of Nick Nemeth for a FREE no-obligation consultation.
Don’t Wait—Resolve Your Letter 12C Today
If you’ve received an IRS Letter 12C, timely and accurate action is critical. Don’t risk losing your refund or tax credits.
Contact The Law Offices of Nick Nemeth for a FREE, no-obligation consultation. We’ll review your situation and help you respond properly so you can move forward with peace of mind. Serving taxpayers in Dallas, Fort Worth, and Frisco, we’re here to help you every step of the way.
Received an IRS Notice?
Don’t worry, but act immediately to avoid getting into deeper trouble. Get in touch with the IRS Attorneys at The Law Offices of Nick Nemeth for a No-Obligation Consultation. You can also call us at (972) 426 2991 or fill out a Free Case Evaluation Form.