Filing your North Dakota tax return for the 2021 tax year may seem challenging, especially if you handle your taxes or manage business income. This guide provides individuals and small business owners clear and official guidance on efficiently navigating the tax filing process. Whether it is your first time preparing a return or seeking ways to improve your refund, this article will walk you through the complete process using accurate information from the North Dakota Office of State Tax Commissioner.

Throughout this article, you will learn how to choose the right filing options, what forms to use, how to calculate your income and deductions, and whether you owe a tax bill or are due a refund. Important updates from the 2021 tax season, such as new credits and rule changes, will also be explained. Completing each step properly reduces the chance of errors and allows you to claim every benefit.

Filing a return does not have to be a hassle. With expert-backed guidance, helpful resources, and official tools, North Dakota taxpayers can complete their returns accurately, pay any balance due on time, and track their refund status without delay.

Who Needs to File a North Dakota Tax Return?

Residency and Tax Status

Your filing obligation in North Dakota for the 2021 tax year depends primarily on your residency classification. The state recognizes full-year residents, part-year residents, and nonresidents. If you were a full-year resident and needed to file a federal income tax return, you must also file a North Dakota return. Part-year residents and nonresidents must file if they earned income from any North Dakota sources, even if they lived outside the state.

North Dakota also applies a 210-day rule. If you maintained a permanent home in the state and were physically present for more than 210 days during the year, you are considered a full-year resident for tax purposes. This classification helps determine what forms to file, how your income is reported, and whether you qualify for specific deductions, credits, or tax tips.

Income Requirements and Filing Thresholds

Filing is generally required if you filed a federal return. Even if you expect a refund or had little tax owed, submitting your return ensures the state records your income, withholding, and eligibility for benefits. This is the only way to claim the Tax Relief Credit, the Social Security exclusion, or other credits.

Who May Still Owe Taxes

You may still owe taxes this year even with prior refunds or withholding. Income increases or reduced deductions can raise your tax bill. You could owe interest and penalties if you did not make estimated payments, especially on self-employment income. Paying on time helps avoid future issues.

Tax Filing Options for 2021

z For the 2021 tax year, individuals and small business owners had access to digital and paper-based filing solutions. Whether you are filing for the first time or have submitted returns for several years, understanding your available filing options helps reduce hassle and avoid errors.

Electronic Filing Options

  • Online Fillable Forms: The state provided official fillable forms directly on its website, allowing users to complete and submit returns electronically.

  • Tax Preparation Software: Many taxpayers used secure, state-approved e-filing software that offered guided help that was beneficial for those claiming multiple deductions or benefits.

  • Assistance Programs: Programs like Volunteer Income Tax Assistance (VITA) and Tax Counseling for the Elderly (TCE) were available to eligible filers who needed hands-on help filing electronically.

  • Filing from Any Device: North Dakota's digital system supported access from computers, tablets, or smartphones, making it easier to file from home or on the go.

E-filing remains the most convenient and widely used filing method. It offers faster processing, fewer errors, and immediate confirmation of receipt. Electronic filers also experience shorter refund wait times compared to paper filers. To explore federal e-file options, visit the IRS official filing page.

Paper Filing Options

  • Manual Completion: Taxpayers who preferred traditional methods could print and fill out Form ND-EZ or Form ND-1 by hand.

  • Mailing Address: Completed returns and all required documents had to be mailed to the Office of State Tax Commissioner using the correct address listed in the 2021 instructions.

  • Return Assembly: Before mailing, filers needed to include a complete copy of their federal return, all supporting schedules, and any payment vouchers in the proper order.

Paper filing may suit individuals who are uncomfortable using digital tools or need to attach extensive documentation. However, this method typically requires more time for delivery and processing.

Choosing between e-filing and paper submission depends on your comfort level, device access, and whether you qualify for free assistance. Either method allows you to complete your tax return accurately and confidently meet your filing deadline.

Which Tax Forms to Use for Individuals and Small Businesses

Choosing Between Form ND-EZ and Form ND-1

North Dakota provides two primary forms for filing: Form ND-EZ and Form ND-1. Your choice depends on the complexity of your income and whether you claim any deductions or credits. If your only income comes from wages or retirement and you do not claim credits, Form ND-EZ may be the right option. For filers with estimated payments, itemized deductions, or income from other states, Form ND-1 is required.

Use Form ND-1 if you are a part-year resident, plan to claim the Tax Relief Credit, or qualify for Renaissance Zone benefits. Selecting the wrong form may result in delays or rejected returns. Carefully review the eligibility rules before starting to ensure your return is complete and accurate.

Forms for Small Business Owners and Sole Proprietors

Business owners and sole proprietors must file Form ND-1. In addition, relevant federal forms such as Schedule C or Schedule SE should be included. If eligible for Renaissance Zone credits, complete Schedule RZ. Proper documentation lets you report your business income, claim deductions, and access tax benefits.

Required Supporting Forms and Documents

All filers must include a full federal return with schedules, regardless of form type. Additional state forms may apply, such as Schedule ND-1NR for nonresidents or Form ND-1V for payment. Missing forms can delay your refund or cause notices. Following the state’s filing instructions helps you file correctly and avoid processing issues.

Step-by-Step Guide on How to File Your North Dakota Tax Return for 2021

Step 1: Gather All Required Documents

Start by collecting all necessary documents for the 2021 tax year. This includes W-2s for wages, 1099s for additional income, and your complete federal return, including Form 1040 and all attached schedules. If you are self-employed or operate a small business, gather expense records and relevant federal forms such as Schedule C.

Your Social Security number, bank details for payment or refund, and any tax notices or estimated payment confirmations are available. Organized documentation ensures your return is accurate, reduces hassle, and speeds up the process.

Step 2: Enter Personal, Residency, and Filing Information

Begin your return by entering your full name, address, Social Security number, and filing status. Your residency, whether full-year, part-year, or nonresident, must be clearly stated, as it determines your filing requirements and eligibility for deductions and credits. Spouses must both be listed on joint returns.

North Dakota residents who spent over 210 days in the state in 2021 are treated as full-year residents. Nonresidents and part-year filers must also complete additional forms.

Step 3: Report Income, Apply Deductions, and Claim Credits

Enter your federal adjusted gross income and report all North Dakota-source income, including wages, self-employment, and retirement distributions. Apply the standard or itemized deduction, then claim credits like the Tax Relief Credit or other benefits. Filing correctly ensures your return is complete and helps determine whether you will receive a refund or owe taxes.

Key Tax Updates and Credits for the 2021 Tax Year

Expanded Social Security Benefit Exclusion

The Social Security benefit exclusion expansion was a significant change in the 2021 tax year. Previously limited by income, this benefit is now available to all North Dakota taxpayers. Regardless of income level or filing status, individuals receiving retirement benefits may exclude those amounts from taxable income. This update increases the chance of receiving a refund or reducing your state tax bill.

You must accurately enter the amount from Form SSA-1099 and report it on Form ND-1, line 15. Claiming this exclusion helps ensure your income is correctly calculated for the return.

New and Enhanced State Tax Credits

The state introduced a new Tax Relief Credit in 2021. Full-year residents filing as single, head of household, or married filing separately may claim a $350 credit. Married joint filers may claim $700 if both spouses qualify or $350 if only one does. Enter this on Form ND-1, line 20.

Other updates include increased deductions for stillborn children and enhanced credits for donations to nonprofit schools and hiring developmentally disabled individuals. Renaissance Zone benefits also remain available to eligible businesses.

Stay Informed When Managing Your Taxes

These tax updates reflect essential policy shifts. Whether filing with assistance or handling your taxes, staying informed ensures you receive all available benefits. Even small changes can help you pay less or qualify for a refund, especially when properly documented and filed on time.

Payment and Refund Information

Payment Deadline
All tax payments for the 2021 tax year were due by April 15, 2022. Filing your return without submitting the full amount owed may result in additional charges. To avoid penalties and interest, ensure your payment reaches the North Dakota Office of State Tax Commissioner by the deadline noted in your return instructions.

Electronic Payment Options
North Dakota allows you to pay your balance electronically using a secure direct debit (ACH) from your bank account. This method is free and ensures immediate processing. Although convenience fees may apply, you may pay using a credit or debit card through the same portal. The third-party processor collects these fees, not the state.

Paper Payment Options
If you mail your payment, you must include the correct payment voucher. Use Form ND-1V if you filed electronically and are paying by check. Use Form ND-1PRV if you submitted a paper return. All payments must be made using U.S. or Canadian funds. Write your Social Security number and “2021 ND-1” on the memo line of your check to ensure proper application.

How to Track Your Refund
If you expect a refund after filing, you can monitor its status online. To access your information, you must provide your Social Security number, filing status, and expected refund amount. Electronic filers typically receive their refund faster than those who file by paper, especially if they request direct deposit. Paper checks are issued if banking information is incomplete or rejected by your financial institution.

Penalty and Interest for Late Payments
If you owe money and fail to pay on time, penalties are assessed at 5% per month up to a maximum of 25%. Interest is charged at an annual rate of 12% on any unpaid balance. Filing on time but not paying may still result in these charges. Submit payment in full when completing your return to reduce your risk of owing extra.  

Max Refund Strategies and Common Mistakes to Avoid

Strategies to Maximize Your Refund

  • Claim all eligible deductions and credits
    Review all possible deductions, such as charitable donations, health expenses, or retirement contributions. Apply credits like the Tax Relief Credit, the Social Security exclusion, or credits for taxes paid to other states to lower your tax bill or increase your refund.

  • Use the correct filing status.
    Selecting the right filing status, single, head of household, or married filing jointly, affects your refund amount. Use the status that gives you the most significant benefit.

  • Report all tax documents.
    Ensure every W-2, 1099, and federal form that reflects income or withholding is reported. Missing documents can lead to underreported income or delayed processing.

Common Mistakes That Delay Refunds

  • Incorrect personal or banking information
    Mistakes in Social Security numbers or bank details can delay refunds or result in rejected direct deposits. Double-check this information before filing.

  • Math and calculation errors
    Errors in simple arithmetic or credit totals can delay your return or reduce your refund. Use tools or professional help to confirm your numbers.

  • Submitting unsigned or incomplete forms
    A missing signature or skipped section renders your return incomplete and may result in a mailed notice from the tax department.

How to Avoid Filing Errors

  • Review your return before submitting.
    Set aside time to look over every form, schedule, and figure. Verify income totals, deductions, and final refund or bill amounts.

  • Attach all required documents.
    Include a complete federal return, all W-2s and 1099s, and any additional schedules required for credits or special deductions.

  • Keep a copy for your records.
    Retain a full copy of your filed return and payment confirmations. This can help if you receive a notice or need to amend the return later.

Avoiding errors and using every available benefit can lead to a faster refund and a smoother filing process. Minor corrections made before submission can prevent major complications later.

Tax Experts and Free Filing Help for North Dakota Taxpayers

When to Seek Help from Tax Experts

Filing your taxes can be manageable, but certain situations may require the support of trained professionals. Operate a business, own rental property, have multiple income sources, or are amending a prior-year return. A tax expert can help you file correctly and avoid costly errors. Tax professionals are also helpful when dealing with complex deductions, investment reporting, or tax notices from the state.

Both enrolled agents and certified preparers know the most recent changes to the state's tax laws for the 2021 tax year. Additionally, they can help you find credits or deductions you may have missed that could increase your refund or lower your debt. Working with an expert ensures your return is accurate and submitted completely the first time.

Where to Find Free Filing Support

If you do not need full-service assistance, North Dakota offers access to several free programs designed for basic tax filing. The Volunteer Income Tax Assistance (VITA) program helps individuals who meet income limits, persons with disabilities, and taxpayers with limited English proficiency. Tax Counseling for the Elderly (TCE) offers similar services to those aged 60 or older.

These programs are staffed by trained volunteers who can help you complete your state and federal returns. They also ensure you meet all filing requirements and attach the correct forms. Free filing options are especially valuable to first-time filers and those with simple returns who want to reduce hassle and avoid unnecessary filing costs.

Taking Ownership of Your Taxes: Filing with Confidence

Filing your taxes builds long-term understanding.
Taking control of your taxes allows you to gain firsthand knowledge of how your income, deductions, and tax credits affect your return. Instead of relying entirely on software or a third party, filing manually or with basic assistance helps you better understand what you’re signing and why. This knowledge is valuable for future tax years and gives you more control over how much you pay or get refunded.

Responding to tax changes prepares you for the future.
Every tax year brings updates, credits, or policy changes, and those who file independently are more likely to stay informed. In 2021, new credits and expanded exclusions were made available that many filers missed simply because they were unaware of. Acknowledging these tax updates and knowing how to apply them ensures you are not leaving money behind. Being proactive about these changes helps you respond to future tax news without stress.

Filing independently reduces hassle over time.
Although filing may initially seem intimidating, it becomes easier with experience. Many customers who once felt unsure now confidently file independently after just one or two seasons. Maintaining organized records and reviewing official guidance reduces the need to rely on experts for every small detail. Owning your tax process also allows you to file on your schedule, sign everything securely, and meet your filing date with fewer delays.

Acknowledging your role as a taxpayer brings clarity.
Signing your return is more than a formality—it’s a legal confirmation that you reviewed, understood, and approved the information provided. When you prepare your return, signing becomes a confident step rather than a passive task. This clarity helps eliminate second-guessing and builds trust in the information you submit.

Final Checklist Before Submitting Your Return

Completing a final review is essential before sending your North Dakota tax return. Taking a few minutes to check your entries can prevent processing delays, missed refunds, or unnecessary notices from the state. This step is crucial if you’re managing your taxes or filing without assistance from tax experts. A detailed checklist can reduce filing errors and ensure compliance with the 2021 tax year requirements.

Return Completion

  • Confirm all forms are correctly filled out.
    Verify that every line of your state and federal forms has been completed. Leaving key sections blank can result in an incomplete return.

  • Ensure your signature is present and correct.
    One of the most common and costly mistakes is forgetting to sign a paper return. If filing jointly, make sure both spouses sign.

  • Double-check all calculations.
    Confirm the accuracy of income totals, deductions, credits, and final refund or balance due. Even minor math errors can lead to processing delays.

Required Documents

  • Attach a full federal return copy.
    Include all pages of your IRS Form 1040 and accompanying schedules. This allows the state to confirm your federal income and deductions.

  • Include all W-2s and 1099s.
    Submit every wage or income statement that reflects North Dakota earnings or withholding. Missing one could trigger a correction notice.

  • Add supporting forms or vouchers.
    Attach Form ND-1V or ND-1PRV for payments. If you claimed a credit or special deduction, include the required schedule.

Submitting a complete, signed, and well-documented return helps you avoid the hassle of re-filing or responding to state notices later. Filing on time and confirming your documents are in order helps meet the legal deadline and speed up refund processing. Taking ownership of the process makes future tax seasons easier and more predictable.

Frequently Asked Questions

What if I missed the deadline for filing on April 15, 2022?

If you missed the filing date, you should still file your return as soon as possible. A late return may lead to penalties and interest if you owe money. Filing quickly limits these costs. Even if you cannot pay in full, filing acknowledges your responsibility and reduces further complications.

Can I still receive a refund if I file late?

You can still claim it if you are owed a refund and file within three years of the original due date. Filing late does not automatically cancel your refund. However, if you wait too long, you risk losing the opportunity to receive the money you are entitled to.

How do I amend my 2021 North Dakota tax return?

To amend your return, file a corrected Form ND-1 for the 2021 tax year. Write “AMENDED” at the top and attach revised federal forms and supporting documentation. North Dakota does not offer a separate amendment form. This process ensures your new information is processed accurately. 

What are the most common mistakes that cause delays?

Mistakes often include unsigned forms, incorrect Social Security numbers, missing W-2s, and math errors. These issues delay processing and may result in correction notices. Review your return before submitting it, and use the tax tips provided in the official instructions to prevent delays and protect your refund.

What tax incentives apply to small business owners?

Business owners may qualify for Renaissance Zone incentives, income exemptions, and investment credits. To claim these, complete Schedule RZ and submit all required documentation. These benefits reduce your tax bill and support economic development. Always acknowledge the rules listed in the program guidelines when claiming business-related credits.

Are there free options for help with filing my taxes?

Yes, North Dakota offers access to VITA and TCE programs, providing eligible individuals free filing help. These services are ideal for those managing their taxes without a paid preparer. Depending on your location and eligibility, assistance is available in person or online.

Where can I find reliable tax tips each year?

The most reliable tax tips come from the North Dakota Office of State Tax Commissioner and the IRS. Their updates reflect changes in credits, deductions, and filing requirements. Reviewing this guidance annually helps you file correctly and fully utilize your available benefits each tax year.