Nebraska Notice of Deficiency Determination: What to Do After Receiving This Notice
Introduction
The Nebraska Notice of Deficiency Determination is an official document from the Nebraska Department of Revenue stating that your tax account shows a discrepancy between what you reported and what state records indicate. This notice formally begins the assessment process and claims you owe additional tax, penalties, or interest. Understanding your options and responding within the statutory deadline protects your right to dispute the assessment and prevents collection actions that become harder to resolve later.
What This Notice Means
Your notice indicates the specific tax year involved, the additional tax amount claimed, any penalties or interest added, and your deadline for response. This is the state’s formal assessment following an audit, examination, or review of your records. You have the legal right to dispute this assessment, but you must file a protest within the deadline stated on the notice or lose your appeal rights under Nebraska law.
Why You Received This Notice
The Nebraska Department of Revenue issues deficiency determinations when state records show income or deductions that differ from your return, when you fail to file required returns, or when audits reveal errors. The state may have received information from employers, financial institutions, the Internal Revenue Service, or federal sources indicating unreported income or changes to your federal adjusted gross income. The notice represents the formal result of that review process completed by the Department of Revenue under the Nebraska Revenue Act of 1967.
What Happens If You Ignore This Notice
Failing to respond by the statutory deadline means the assessment becomes final by operation of law. Once final, the state may place liens on your property, garnish wages, intercept refunds, or pursue other enforcement methods. Missing the protest deadline also eliminates your right to challenge the assessment before the Tax Equalization and Review Commission or district court. Interest and penalties continue accumulating on the original assessment amount throughout this period at the interest rate specified by Nebraska law.
Step-by-Step Checklist: What to Do After Receiving This Notice
Step 1: Read the Entire Notice Immediately
Locate the tax year, total amount claimed, statutory deadline for filing your protest, Department of Revenue contact information, and any case or reference numbers. Read all pages, including appeal rights or protest instructions printed on the notice.
Step 2: Verify Tax Year and Personal Information
Confirm the tax year matches a year when you filed a return or were required to file one. Check that your name, Social Security number, and address are correct on the notice. Contact the Department of Revenue immediately if the notice displays incorrect taxpayer information or lists the wrong tax years.
Step 3: Locate Your Original Tax Return
Find your copy of the Nebraska tax return you filed for the year shown on the notice. If you cannot locate it, request a copy from the Department of Revenue or your tax preparer. Having your original return helps you understand what the state claims is different from what you reported.
Step 4: Understand the Basis for the Assessment
Review the portion of the notice explaining why the assessment was issued. The notice typically shows what you reported, what state records show, and the difference between them. Contact the Department of Revenue to request a detailed explanation if the notice does not clearly identify the basis for the assessment or if clerical errors or mathematical errors appear on the notice.
Step 5: Gather Supporting Documentation
Collect documents that support your original return, including W-2 forms, 1099 forms, receipts for claimed deductions, bank statements, payment records, and correspondence with income sources. Keep original documents in your possession and send only copies if the Department of Revenue requests supporting documentation during the assessment review.
Step 6: Determine Your Response Option
Pay the assessment: You may pay the amount shown if you agree with the assessment and choose not to dispute it. Interest stops accumulating on the tax portion once you pay the full amount claimed by the state.
File a protest: You must file a written Petition for Redetermination with the Tax Commissioner within the statutory deadline if you disagree with the assessment. This preserves your right to challenge in the evaluation through the administrative process.
Request more information: You may contact the Department of Revenue to request a detailed explanation before deciding whether to pay or file a protest. Requesting information does not extend your statutory deadline for filing a protest.
Step 7: File Your Protest Before the Deadline
Sales and Use Tax: File your protest within 60 days from the postmark date shown on the notice mailed to you.
Income Tax: File your protest within 60 days from the postmark date or 150 days if you were outside the United States when the notice was mailed.
Other taxes: Deadlines vary from 10 to 60 days, depending on the specific tax type shown on your notice.
Step 8: Prepare Your Written Protest
Your protest must identify you as the taxpayer, identify the assessment being protested, describe why you believe items are incorrect, state what action you request, request a hearing if desired, and include your signature or your authorized representative's signature. Mail your protest to the Nebraska Department of Revenue, Legal Section, PO Box 94818, Lincoln, NE 68509-4818, or file electronically through the State File Sharing system on the Department of Revenue website.
Step 9: Send Your Protest With Proof of Delivery
Mail your protest using certified mail or a shipping service providing delivery confirmation and tracking numbers. Keep copies of your protest letter, all documents you sent, and proof that the state received your submission. These records protect you if disputes arise about whether you responded within the deadline.
Step 10: Keep Records of All Communications
Maintain copies of your protest, documents sent to the state, delivery confirmation receipts, letters or emails from the Department of Revenue, and notes from phone calls, including the dates and names of those involved. Written records establish what was said and when communications occurred throughout the administrative process.
Common Mistakes to Avoid
- Missing the statutory deadline: Many taxpayers delay opening the notice or assume they have more time than the law allows. The protest deadline runs from the postmark date on the notice, not from when you receive or open it.
- Confusing protest with appeal: Filing a protest means submitting a Petition for Redetermination to the Tax Commissioner within the statutory deadline. An appeal to the district court happens later, only after the Tax Commissioner issues a final order on your protest.
- Sending original documents: Never mail original W-2 forms, receipts, or bank statements to the Department of Revenue. Keep originals in your possession and send only legible copies if the state requests supporting documentation.
- Waiting for clarification before filing: While you may contact the Department of Revenue for explanation, the statutory deadline continues running regardless of whether you receive clarification. File your protest first to preserve your rights, then seek additional information.
When to Consider Professional Tax Help
You should consider hiring a tax professional or attorney if your assessment involves complex tax issues, multiple tax years, or substantial amounts exceeding several thousand dollars. Professional representation becomes particularly important if the Department of Revenue schedules a formal hearing on your protest or if you need to file an amended return addressing federal income tax changes that affected your Nebraska taxable income.
Tax professionals understand the requirements of the Nebraska Revenue Act of 1967 and can navigate the administrative process more effectively than most taxpayers handling protests independently.
Frequently Asked Questions
Does this notice mean the Department of Revenue audited my return?
The notice indicates that the state has completed a review and issued an assessment; however, the state does not always conduct a full audit before issuing deficiency determinations. The notice itself represents the formal assessment phase regardless of what review process preceded it.
Can I pay the assessment later instead of immediately?
You can choose when to pay, but interest continues accumulating until you pay the full amount. More importantly, if you want to dispute the assessment, you must file your protest before the statutory deadline expires or lose your right to challenge it.
What if I filed my return years ago and can no longer remember what I reported?
Request a copy of your filed return from the Department of Revenue or your tax preparer. Having the actual return helps you understand what the state claims is different and whether you agree with their findings.
Can I call the Department of Revenue to ask questions about the notice?
You can and should call Customer Service if the notice is unclear. However, also request a written explanation or confirmation so you have permanent records. Phone calls help clarify issues, but written communication protects you if disagreements arise later about what was said.
What happens after I file my protest?
The Department of Revenue will schedule an informal conference to review your protest and any additional documentation you provide. If issues remain unresolved, the case may proceed to a formal hearing before the Tax Commissioner or an appointed hearing officer.
Does filing a protest stop collection activity?
Filing a timely protest suspends the statutory time restrictions for collection until the Tax Commissioner issues a final determination. The assessment is not final until 30 days after the Tax Commissioner issues an order on your protest.
Received a State Tax Notice?
If you’ve received a state tax notice and aren’t sure how to respond, we can help you review your options and next steps.
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This checklist is for educational purposes only and does not constitute tax or legal advice. Always review official IRS instructions and consult a qualified professional for guidance

