Filing your Delaware income taxes for 2016 may feel overwhelming, especially if it’s your first time or you're catching up on a past-due return. This article will help you understand what to submit, where to send it, and how to determine whether you owe additional taxes or qualify for a refund, especially if it’s your first time handling the paperwork or revisiting an older tax year. Whether you’re an individual taxpayer or a small business owner, understanding the required tax filing steps will help you avoid delays, penalties, and costly mistakes.
This guide provides a clear, organized breakdown of how to file accurately, what forms you need, and how to pay or track your refund. The 2016 tax season may be over, but the filing rules still matter if you missed the deadline or received a late notice from the state. This step-by-step article will walk you through the process—whether sending paper forms by mail or using a secure digital method.
We aim to make the experience less hassle by offering practical guidance from start to finish. Instructions are designed to be simple, reassuring, and accessible—no legal background or tax expertise required.
Delaware residents who lived in the state for all of 2016 must file a tax return if their adjusted gross income (AGI) was above certain thresholds. These limits vary depending on your age and filing status; meeting or exceeding them means you're responsible for submitting a return.
Here are the minimum income thresholds for full-year residents:
If unsure, check your W-2s or ask your employer or financial institution for your 2016 income records. Filing may still be required even if taxes were withheld.
If you lived in Delaware for only part of the year, you're a part-year resident. You must file if you earned any income while living in the state or received Delaware-based income before or after moving.
Complete the correct form and report your residency dates to avoid errors.
Even if you didn’t live in Delaware, you must file if you earned Delaware-source income—such as wages, rent, or freelance work.
To file correctly, visit the Delaware Division of Revenue and find the proper forms to comply with your taxes.
Your 2016 Delaware state return can be filed electronically or using traditional paper forms. Choosing the right option depends on your personal preference, access to a device, and comfort with the tax filing process. Each method has pros and cons; understanding them can reduce hassle, improve accuracy, and help you meet the state’s filing date requirements.
Filing taxes online is faster, more convenient, and results in fewer errors. Delaware’s Division of Revenue accepted e-filed returns for the 2016 tax year through approved providers and software.
Benefits of filing taxes electronically include:
Filing by Mail Using Paper Forms
While filing online is more popular, some taxpayers prefer paper forms, especially those filing for the first time or who prefer keeping physical records.
When to consider filing on paper:
Please complete all forms, sign your return, and send it to the correct mailing address based on whether you’re getting a refund or enclosing a payment.
Always review the instructions on the state’s official page, whether you file online or by mail. Selecting the best method that suits your situation will make the process smoother and more accurate.
Delaware requires different forms depending on your residency status in 2016. If you were a full-year resident, you must file Form 200-01. If you were a non-resident or part-year resident, you must use Form 200-02 instead. These forms are based on your federal adjusted gross income and will determine your income tax liability to the state.
Before beginning, you should access your previous federal return, W-2s, and any supporting documents from your financial institution. Form 1027 is used if you request an extension, and DE2210 applies if you have underpaid estimated taxes. You can visit the Delaware Division of Revenue website to find and download any of these forms.
Certain tax credits and deductions require additional documentation. For example, if you claimed the Earned Income Tax Credit (EITC) on your federal return, you must also complete Delaware’s Schedule II. If you paid taxes to another state, you must prepare Schedule I and include copies of the other state returns to qualify for a credit.
Other forms, like Form 700 for land conservation and Form 5403 for real estate tax reporting, may be required depending on your financial activity during the year. It’s important to review each carefully and ensure all information is complete before submission. If you’re unsure which schedules apply to your situation, seeking expert help is best to avoid missing eligible deductions or delaying your refund.
If you ran a business in Delaware in 2016, the forms you need depend on how your company was structured. C corporations must file Form 1100, S corporations use Form 1100S, and partnerships use Form 300. For partnerships with non-resident partners, Form 200-C is required to report composite personal income tax.
Sole proprietors don’t file a separate business return but must include a copy of their federal Schedule C with their personal Delaware return. Business income flows through to the individual tax return. In addition, all Delaware businesses are subject to gross receipts tax, which must be filed and paid separately. This process often confuses new filers, so reviewing official instructions or seeking expert help is highly recommended. If you fail to address these responsibilities properly, you may face penalties, especially if you fail to file for several years.
Gather your financial records early.
Start by collecting all necessary documents to prepare your 2016 Delaware return. This includes your federal tax return (Form 1040), W-2s from employers, 1099s for contract work or investment income, and any records of Delaware taxes withheld. Don’t forget documentation from your financial institution, such as interest statements or mortgage forms. Keeping everything organized will save time and reduce the chance of making errors.
Access and complete the correct Delaware forms.
Depending on your residency status, download and fill out Form 200-01 (for residents) or Form 200-02 (for part-year or non-residents). If you underpaid estimated taxes during the year, include Form DE2210. If you filed for an extension, submit Form 1027. Make sure each form is complete and matches your federal income details. You can visit IRS Where's My Refund? A tool to find updated instructions for these forms.
Enter personal details and tax information.
Fill in your name, Social Security Number, address, and filing status. Be sure to match your Delaware filing status with your federal return. You’ll also be asked to provide your county code and other identifying information. Mistakes in this section can cause processing delays or rejection of your return.
Calculate your Delaware adjusted gross income.
Begin with your federal AGI and apply any additions or subtractions specific to Delaware law. This may include retirement income, tax-exempt interest, or other state adjustments. Double-check each number to avoid errors. If you qualify for special deductions or exemptions, apply them here.
Choose between standard or itemized deductions.
Delaware allows you to take a standard deduction or itemize, just like on your federal return. Use the method that provides the most tax benefit. For many filers, the standard deduction is simpler and faster. However, itemizing can save you more money if you have eligible medical expenses, charitable donations, or mortgage interest.
Apply all credits and payments.
List any Delaware tax withheld by your employer (as shown on your W-2 or 1099 forms). Enter any estimated tax payments you made throughout 2016. Then, apply any nonrefundable credits, such as the Delaware Earned Income Tax Credit using Schedule II, or credits for taxes paid to other states using Schedule I. These credits reduce what you owe but won't be refunded if your liability is zero.
Calculate your refund or balance due.
After applying credits and payments, the form will show whether you’re eligible for a refund or if you owe additional taxes. If you expect a refund, you can request direct deposit to a checking or savings account. You must pay by the deadline to avoid penalties or interest if you owe taxes.
Attach required schedules and documents.
Make sure to include all necessary forms and schedules with your return. If you’re a sole proprietor, attach a copy of your federal Schedule C. Include W-2s, 1099s, and any documents that verify credits or deductions. Double-check that everything is legible and in the correct order before submitting.
Sign and date your return.
Before submitting your return, review every section carefully and ensure it's free from math errors or missing information. Then, sign and date the form in the appropriate section. Unsigned returns may be rejected or held for further review, delaying your refund.
Choose how to file: mail or electronic.
If you are mailing a paper return, send it to the correct address based on whether you're including a payment, requesting a refund, or reporting a zero balance. You can also file taxes electronically through authorized e-file providers. Using a secure device and filing online helps reduce processing time and ensures your return is received.
Seek expert help if needed.
If anything feels unclear or your situation involves multiple states, self-employment income, or older returns, don’t hesitate to seek expert help. Tax experts can help you understand credits, reduce tax liability, and avoid problems down the line. For many taxpayers, professional advice can be both helpful and cost-effective.
If you owe taxes for the 2016 filing year, you’re still responsible for submitting payment even if you're filing late. Delaware accepted multiple payment options during that period, many of which remain available for overdue balances today. The easiest way to pay is online through the Delaware Division of Revenue's secure system, where you can use a credit card or direct debit from a financial institution.
Payments could be made using:
If you use paper forms, include a payment voucher and send a check or money order payable to “Delaware Division of Revenue.” Write your Social Security Number on the check and mail it to the address in the instructions for your form type.
For the 2016 tax year, payments were due by May 1, 2017. If you missed that deadline, interest and penalties may apply until full payment is received. The state assesses late-payment interest even if you filed for an extension, because an extension only delays the return, not the money due.
Always submit the correct forms and write legibly if mailing to ensure your payment is credited correctly. You can also contact the Delaware Division of Revenue via phone or their website for confirmation and payment tracking. The state sometimes offers payment plans if your balance is too large to settle at once.
Suppose your situation is complex or involves multiple years. In that case, consulting with a tax expert who can assist with back filings, amended returns, and negotiations with the state may be helpful.
You must review your eligibility for every credit and deduction to get the maximum refund possible from your 2016 Delaware tax return. One of the most common missed opportunities is the Delaware Earned Income Tax Credit (EITC), which is limited to 20% of your federal EITC and must be reported using Schedule II. You may also qualify for credits related to land conservation, higher education, or taxes paid to other states.
Ensure your return is complete, accurate, and includes all supporting forms such as W-2s, 1099s, and federal schedules. Minor errors or missing documents can delay your refund or reduce the amount you owe. If you're uncertain about your eligibility, contact a tax professional or seek expert help to confirm you're not leaving money on the table.
Once your return has been filed, allow time for processing. For 2016 tax returns, the typical timeline was five business days for e-filed returns and four to six weeks for paper returns. If your return requires additional review, it may take longer.
To check the status of your Delaware refund, you’ll need your Social Security Number and the exact amount of your expected refund. Visit the state’s refund inquiry page, which is still accessible for prior-year returns, and follow the instructions provided. Keep in mind that outdated or incomplete information can delay updates in the system.
If your refund has been “pending” for more than 10–12 weeks, it’s best to contact the Delaware Division of Revenue directly. Provide any verification documents they request and confirm that your mailing address is up to date. It’s also helpful to keep a copy of your submitted return in case further questions arise.
Not signing your return.
One of the most common and easily overlooked mistakes is forgetting to sign your tax return. Delaware will not process unsigned paper returns, and this error can lead to delays in refunds or penalties if taxes are due. Always double-check this step before you send or upload your forms.
Using the wrong form for your residency status.
Those who moved in or out of Delaware this year often file with the wrong form. Full-year residents must use Form 200-01, while part-year and non-residents should file Form 200-02. Using the incorrect form can affect how your income is calculated and whether you qualify for credits or deductions.
Missing or incorrect documentation.
Failure to include copies of W-2s, 1099s, and required federal schedules often results in rejected or delayed returns. Prepare a complete packet, especially if you’re mailing a paper return. Ensure your supporting documents are accurate, legible, and clearly labeled.
An incorrect mailing address or outdated contact information can lead to issues with your return.
If you're mailing your return or waiting for a check, an incorrect address can cause your refund to be lost or delayed. Be sure to use the mailing address listed in the 2016 instructions and confirm that all your contact information is current.
Avoid filing without expert help when necessary.
Delaware’s tax rules—especially those tied to older returns—can be complex. If you’re uncertain about applying credits, reporting income from multiple states, or filing as a business owner, please avoid making assumptions. Seek expert help or look for guidance from official resources to avoid costly errors.
If you are uncertain about how to file your 2016 Delaware tax return—or if it is your first time handling a prior-year filing—you are not alone. Tax laws and form instructions can be confusing, especially when deadlines have passed and documentation is harder to retrieve. Many filers find reassurance by seeking trusted support to navigate the process confidently and avoid common mistakes.
Delaware residents can visit the state’s Division of Revenue for official instructions, archived forms, and help with payment options. In addition, services like the AARP Foundation’s Tax-Aide program offer free tax preparation for low- to moderate-income individuals, particularly seniors. These resources provide personalized guidance, help with form selection, and review your eligibility for missed credits or deductions. They’re invaluable if you’ve never filed for that tax year before.
For more complex cases, such as multi-state income, small business filings, or unfiled returns from several years ago, it’s best to work with licensed tax experts. You can locate a professional through national directories like the National Society of Accountants or consult a local enrolled agent. These professionals offer targeted expert help, review your prior filings, and assist with corrections or payment arrangements if needed. Their peace of mind is often well worth the cost—especially if you're filing under pressure or uncertainty.
Completed all required forms.
Ensure that you’ve filled out the correct 2016 Delaware forms based on your residency status and tax situation. Form 200-01 is for residents, while Form 200-02 applies to non-residents or part-year residents. Include any additional schedules, such as Schedule I, as needed.
Attached all supporting documents.
Include copies of W-2s, 1099s, and required federal forms or schedules. Self-employed individuals must also include their Schedule C. Missing documentation can delay the process or result in a rejected return.
Signed and dated the return.
Before submitting, confirm that your return is properly signed and dated. Unsigned returns are not processed and may result in delayed refunds or penalties if you owe taxes.
Include payment or refund details.
If you are sending a payment, include the appropriate voucher and label the check or money order with your name and Social Security Number. If expecting a refund, double-check your financial institution details for direct deposit.
Used the correct mailing address.
Send your return to the correct address based on whether you owe taxes, are due a refund, or have a zero balance. This helps ensure it reaches the proper department without delay.
Saved a complete copy for your records.
Always retain a copy of your complete return, including any confirmation if filed electronically. This documentation is helpful if you need to contact the Division of Revenue for support or clarification.
You must legally acknowledge your filing responsibility even if the state hasn’t contacted you. Delaware expects all qualifying taxpayers to meet their obligations, regardless of reminders. Filing now, even late, helps you avoid further penalties or interest. It also protects your refund eligibility if you overpaid during the income tax year.
If you're eligible for a federal IRS refund, you must claim it three years from the original due date—until May 1, 2020. After that, the refund typically expires. However, it’s still smart to file, especially if you owe Delaware taxes. Filing helps you stay compliant with the IRS and the state, even if no refund is available.
You don’t need to delay your tax filing because you can’t pay in full. Delaware may allow installment agreements if you submit your return first. Payment plans can reduce stress while keeping penalties manageable. If you’re unsure how to proceed, contact the Division of Revenue or get help from a licensed tax professional familiar with older filings.
Yes, but filing your taxes for an older year, like 2016, can be tricky. You’ll need to locate the correct forms and understand outdated filing rules. If your situation is simple, self-filing may work. For more complex cases, consider getting expert help to avoid missed deductions, misfiled forms, or processing delays.
Start by reviewing your income type and residency status. Use Form 200-01 for residents and Form 200-02 for part-year or non-residents. You may also need additional schedules depending on your credits. Delaware’s website provides form archives and instructions. To be sure you’ve chosen correctly, seek guidance or speak with a qualified tax expert.
You can locate tax experts through national directories like the National Society of Accountants or consult local enrolled agents. Some nonprofit organizations also offer help with past-due returns. Professional support benefits small business owners, multi-state income earners, or anyone who hasn’t filed for several years.
If you realize an error, you should file an amended return for 2016. Use the same forms you submitted initially and mark them as corrected. Always include an explanation and supporting documents. This helps the state acknowledge your update and apply any refund or adjustment properly. Seek expert help if the error affects multiple parts of your return.
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