🌉 Delaware USA • Division of Revenue, Taxpayer Portal, refund, gross receipts, withholding and phone help

Delaware DOR 2026: State Tax Filing, Refund, Login & Phone

A practical Delaware Department of Revenue guide for people searching “Delaware Department of Revenue,” “Delaware DOR,” “Delaware Division of Revenue,” refund status, Delaware Taxpayer Portal login, personal income tax filing, business license registration, gross receipts tax, withholding tax, corporate income tax, payment plans, mailing addresses and official phone numbers.

🏛️ Official Division of Revenue 🔐 Taxpayer Portal ✨ Use Delaware DOR Helper

Correct agency nameDelaware tax administration is handled by the Division of Revenue under the Department of Finance.

Main individual phonePersonal Income Tax Assistance: 302-577-8200.

No state sales taxDelaware has no general state sales tax, but businesses may owe gross receipts tax and license fees.

🔐 Portal ☎️ 302-577-8200

Quick Answer: What Does the Delaware Department of Revenue Do?

Most people searching for the “Delaware Department of Revenue” need the Delaware Division of Revenue, which is part of the Delaware Department of Finance. It handles Delaware personal income tax, refund status, the Delaware Taxpayer Portal, payments, business gross receipts tax, withholding tax, corporate income tax, business license support, collections, tax forms, audits, taxpayer assistance and Revenue office contacts.

Independent guide disclaimer: this website is not the official Delaware Division of Revenue website. Use official Delaware Division of Revenue, Delaware Taxpayer Portal and Delaware One Stop pages for filing, payments, refund status, account access, licensing, forms, notices and legal tax decisions.

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For individuals

Use the Delaware Division of Revenue for Delaware personal income tax filing, PIT-RES, PIT-NON, estimated tax, extensions, refund status, payments, mailing addresses, notices, collections and taxpayer assistance.

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For businesses

Use Delaware Revenue and Delaware One Stop for business licensing, gross receipts tax, withholding tax, corporate income tax, business payments, W-2/1099 filing, account updates and tax forms.

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For online users

The Delaware Taxpayer Portal supports personal tax filing, refund checking, account payments, estimated tax payments, business returns, W-2/1099 submission and portal account registration.

Delaware DOR Key Facts 2026: Filing, Refund, Login, Phone and No Sales Tax

Use this fast table before you file, pay, check a refund, register a business, call the wrong office or look for a Delaware sales tax permit.

User question	Delaware DOR answer	Best next step
What is the official Delaware tax agency?	The Delaware Division of Revenue under the Department of Finance.	Use revenue.delaware.gov for tax guidance and tax.delaware.gov for portal actions.
Where do I file online?	The Delaware Taxpayer Portal supports personal income tax, payments, refund status and many business actions.	Open the official Taxpayer Portal and choose individual or business services.
Where do businesses register?	Delaware One Stop is the business registration and licensing portal.	Use One Stop to create, renew, change or close Delaware business licenses.
How do I check my refund?	Use the official Check Refund Status tool.	Enter SSN/ITIN and expected refund amount.
How long can manual refund review take?	Delaware Revenue says some personal income tax refunds needing manual review or additional documents may take 10–12 weeks.	Check refund status online before calling.
What is the main individual tax phone number?	Personal Income Tax Assistance is 302-577-8200.	Have tax year, SSN/ITIN, notice and refund/payment details ready.
Does Delaware have state sales tax?	No general state sales tax.	Businesses should still check gross receipts tax, license tax and withholding rules.
Does Delaware have gross receipts tax?	Yes. Many businesses pay gross receipts tax instead of collecting sales tax from customers.	Use the gross receipts filing path and business tax contacts.
Who handles corporate franchise tax?	Delaware corporate franchise tax is connected to the Division of Corporations, not the normal individual tax help path.	Use Division of Corporations for franchise tax and annual report issues.
Can I call about someone else?	Representative access may require authorization or taxpayer permission.	Prepare power of attorney or official authorization before calling.

Official Delaware Revenue Delaware Taxpayer Portal Delaware One Stop Contact Information

Delaware DOR Helper: Find the Right Filing, Refund, Login or Phone Path

Choose your issue and this helper will show the best official Delaware tax path, what to prepare and which page to open first.

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Select what you need. The helper will show the official path, what to prepare and the common mistake to avoid.

Delaware Taxpayer Portal Login 2026: File, Pay, Refund and Account Help

The Delaware Taxpayer Portal is the main online tax system for many Division of Revenue tasks. The portal allows users to register for a portal account, file personal income tax, check refund status, make payments, file extensions, submit estimated tax payments, file business returns, make account payments and submit W-2/1099 information.

Individual portal actions

File a Delaware personal income tax return.
Check where your individual refund is.
Make an estimated tax payment.
Pay a current return or delinquent tax bill.
Make current-year personal income tax payment.
File an extension.

Business portal actions

Create a portal account.
Log in to file business returns.
Make account payments.
Pay a bill or make estimated payment.
Submit W-2/1099 information.
Access corporate income tax, pass-through entity and headquarters management actions when available.

Portal usability tip: the Delaware Taxpayer Portal states that some features are not available through smartphones. Use a computer for full access when a phone screen does not show every feature.

Open Taxpayer Portal Personal Income Tax Forms Business Tax Forms

Delaware Tax Refund Status 2026: Check Return Status, Pending Review and Refund Phone

If you already filed a Delaware return and have not received your refund, use the official refund status tool first. The tool asks for your Social Security number or ITIN and expected refund amount. If the refund shows as pending, Delaware Revenue says to allow 10–12 weeks for processing when manual review or additional documentation is required.

Before checking refund status

Have your SSN or ITIN ready.
Use the expected refund amount from your return.
Know whether you filed electronically or on paper.
Check if any Delaware letter requested more documentation.
Use the official refund tool before calling.
Watch for refund text scams.

Refund contact options

For refund questions, the Check Refund Status tool lists 302-577-8200 for questions. Delaware Revenue’s contact list also includes Refund Assistance at 302-577-8784. Use the online tool first so you can explain the exact status message when you call.

Refund scam warning: Delaware Revenue says it does not send text messages about tax refunds. Do not respond to refund texts requesting personal or banking information.

Check Refund Status Individual Taxpayer Services Call 302-577-8200 Refund Assistance 302-577-8784

Delaware Personal Income Tax Filing 2026: Resident, Nonresident, Estimated Tax and Extension

Delaware residents, part-year residents and nonresidents with Delaware-source income may need to file Delaware personal income tax. The Division of Revenue provides current-year forms, prior-year forms, online filing through the Delaware Taxpayer Portal, estimated tax vouchers, extension forms and mailing addresses for refund, balance-due and zero-due returns.

Individual task	Official path	What to prepare
File resident return	Delaware Taxpayer Portal or PIT-RES form.	Federal return, W-2/1099 forms, Delaware income, credits and withholding.
File nonresident return	Delaware Taxpayer Portal or PIT-NON form.	Delaware-source income, nonresident schedule and federal return details.
Pay current return	Taxpayer Portal payment tools.	Tax year, SSN/ITIN, amount due and bank/payment details.
Make estimated payment	Taxpayer Portal or PIT-EST voucher.	Quarter, estimated income, payment amount and taxpayer information.
File extension	Taxpayer Portal or PIT-EXT voucher.	Estimated tax liability and payment amount if tax is due.
Respond to notice	Use notice instructions, contact Revenue or mail to correct address.	Notice number, tax year, return copy and supporting records.
Request forms	Personal Income Tax Forms page or forms request contact.	Form name, tax year and mailing address if requesting paper forms.

Best workflow: file electronically when possible, save portal confirmations, keep a copy of the Delaware return, and do not mail original documents unless an official notice specifically asks for them.

Individual Taxpayer Services Personal Income Tax Forms File Online

Delaware Business Tax 2026: One Stop, Gross Receipts, Withholding, Corporate Income and No Sales Tax

Delaware businesses usually start with Delaware One Stop for registration and licensing, then use the Division of Revenue and the Taxpayer Portal for tax filing and payment. Delaware does not have a general state sales tax, but many businesses still owe gross receipts tax, business license fees, withholding tax, corporate income tax or other industry-specific taxes.

Business topic	Correct Delaware path	Common mistake to avoid
Business registration and licensing	Delaware One Stop.	Do not use only the Taxpayer Portal if you still need a business license.
Gross receipts tax	Delaware Division of Revenue / Taxpayer Portal.	Do not treat Delaware as tax-free just because it has no sales tax.
Withholding tax	Delaware Revenue withholding resources and Taxpayer Portal.	Do not confuse withholding tax with unemployment or paid leave systems.
Corporate income tax	Division of Revenue business tax forms and portal.	Do not confuse corporate income tax with corporate franchise tax.
Corporate franchise tax and annual report	Delaware Division of Corporations.	Do not call personal income tax assistance for franchise tax due dates or annual reports.
Trade name / DBA	Delaware One Stop after the 2026 transition shown on One Stop.	Do not rely on old Superior Court DBA instructions without checking current One Stop guidance.
W-2/1099 submission	Delaware Taxpayer Portal business services.	Do not wait until year-end if you need portal account access or user permissions.

Business callers should prepare

Legal business name.
Federal EIN.
Delaware business license number if available.
Tax type: gross receipts, withholding, corporate income or other.
Filing period and notice number.
Portal user ID or email if the problem is login-related.

No sales tax does not mean no tax

Delaware’s no-sales-tax reputation causes confusion. Retailers generally do not collect a Delaware state sales tax from customers, but business license tax and gross receipts tax can still apply to business activity.

Delaware One Stop Business Taxpayer Services Business Tax Forms Corporate Franchise Tax

Delaware Department of Revenue Phone Number 2026: Which Number Should You Call?

Use the correct Delaware Revenue contact before calling. This avoids transfers between personal income tax, business licensing, gross receipts, withholding, corporate tax, collections and refund assistance.

Topic	Phone / contact	Use this for	Prepare before calling
Personal Income Tax Assistance	302-577-8200	Individual tax, refund questions, tax portal questions and public service help.	SSN/ITIN, tax year, refund amount, notice and filing details.
Tax Practitioner Support	302-577-5472	Practitioner support and professional tax filing questions.	Client authorization, tax year, taxpayer ID and issue summary.
Collections / Account Management	302-577-8785	Collection notices, account management and delinquent tax issues.	Notice, balance, tax period, payment history and deadline.
Installments	302-577-8586	Installment or payment arrangement questions.	Balance due, income/payment plan details and notice number.
Business License Assistance	302-577-8778	Business license questions.	Business name, EIN, license number and One Stop details.
Gross Receipts	302-577-8780	Gross receipts tax and related business tax reconciliation questions.	Business license, period, receipts, filing confirmation and notice.
Withholding Tax	302-577-8779	Employer withholding tax questions.	EIN, Delaware account, payroll period and W-2/1099 records.
Corporate Tax Refund / Returns	302-577-8781	Corporate income tax returns and corporate refund questions.	FEIN, return copy, tax year and payment/refund information.
Corporate Tax Auditors	302-577-8783	Corporate audit questions.	Audit notice, tax period, corporate records and representative authorization.
Personal Income Tax Auditors	302-577-8994	Personal income tax audit questions.	Audit letter, tax return, schedules and supporting records.
Refund Assistance	302-577-8784	Refund-related accounting assistance.	Refund status message, SSN/ITIN, expected refund amount and tax year.
Taxpayer Portal email	TaxPortal@delaware.gov	Taxpayer Portal questions when email is appropriate.	Do not send full SSN or sensitive information through ordinary email unless official instructions allow it.

Official Contact Information Taxpayer Portal Office Locations

Delaware DOR Mailing Addresses: Refund Returns, Balance Due, Zero Returns and Business Tax

Mailing to the wrong Delaware Revenue address can delay processing. Use electronic filing and payment when possible, but when you must mail, match the address to the return type and payment status.

Mailing need	Address	Use this for
Personal income tax return with refund	P.O. Box 8710, Wilmington, DE 19899-8710	Resident, nonresident or 2D barcode personal income tax returns showing refund.
Personal income tax return with balance due	P.O. Box 508, Wilmington, DE 19899-0508	Resident, nonresident or 2D barcode personal returns with payment due.
Personal income tax zero return	P.O. Box 8711, Wilmington, DE 19899-8711	Resident, nonresident or 2D barcode returns showing zero due.
Bill payments	P.O. Box 830, Wilmington, DE 19899-0830	Bill payment mailing when official instructions direct this address.
Estimated tax payments	P.O. Box 830, Wilmington, DE 19899-0830	Estimated payments and some voucher payments.
Tax protests / conferee	P.O. Box 8714, Wilmington, DE 19899-8714	Protest or conferee-related mailing when official instructions apply.
Corporate returns	P.O. Box 2044, Wilmington, DE 19899-2044	Corporate returns and related corporate return categories.
Gross receipts / license	P.O. Box 2340, Wilmington, DE 19899-2340	Gross receipts and license-related mailing where applicable.
Withholding correspondence / forms	P.O. Box 830, Wilmington, DE 19899-0830	Withholding correspondence, annual forms and periodic withholding items.

Mailing tip: include the tax year, taxpayer ID, notice number and a copy of the relevant notice or voucher. Keep proof of mailing and do not staple unrelated forms together unless the instructions say to.

Official Mailing Addresses Pay Online Instead

Delaware Division of Revenue Office Locations: Wilmington, Dover and Georgetown

Delaware Revenue lists offices in Wilmington, Dover and Georgetown. Before visiting, confirm current hours, services, documents needed and whether your issue can be handled through the Taxpayer Portal instead.

Office	Address	Phone	Best use
Wilmington Office	820 N. French Street, Wilmington, DE 19801	302-577-8200	Personal income tax assistance, public service and Division of Revenue contact.
Dover Office	540 South DuPont Highway, Suite 2, Dover, DE 19901	302-744-1085	Central Delaware taxpayer assistance where available.
Georgetown Office	20653 Dupont Blvd, Suite 2, Georgetown, DE 19947	302-856-5358	Sussex County and southern Delaware taxpayer assistance where available.

Bring this if visiting

Photo ID.
Tax return copy.
Notice or letter from Revenue.
SSN/ITIN or business identification number.
Payment confirmation or refund details.
Power of attorney if representing someone else.

Use portal first when possible

Many filing, payment, refund and account tasks can be completed through the Taxpayer Portal or One Stop. Use in-person help for issues that cannot be solved online or by phone.

Contact & Office Details Office Locations

Delaware DOR Notices, Collections, Installments, Audits and Appeals

If you received a Delaware Revenue notice, bill, audit letter, collection letter or payment demand, read the letter before calling. The correct response depends on the tax type, deadline, balance, documentation requested and whether you agree with the adjustment.

Notice response checklist

Read the notice date and response deadline.
Identify the tax type and tax year.
Compare the notice to your filed return and payments.
Gather W-2, 1099, business records or payment proof.
Use the correct phone number or mailing address.
Keep copies of everything you send.

Important contact paths

Collections / Account Management is 302-577-8785, Installments is 302-577-8586, Personal Income Tax Auditors is 302-577-8994, Corporate Tax Auditors is 302-577-8783, and Tax Conferee contact is handled through the official Revenue contact page.

Deadline warning: calling does not automatically extend a protest, payment, audit or appeal deadline. Follow the written notice instructions and keep proof of any timely submission.

Delaware DOR vs Wrong Agency: Sales Tax, Corporations, IRS, DMV and Unemployment

Delaware has several official portals, and many searches use the wrong agency name. Use this table before waiting on hold or filing in the wrong system.

Your issue	Likely correct agency or portal	Why
Delaware personal income tax, refund, payment or forms	Delaware Division of Revenue / Taxpayer Portal	Revenue handles state income tax and many taxpayer services.
Business license, renewal or Delaware business registration	Delaware One Stop and Division of Revenue	One Stop supports licensing and business registration workflows.
Corporate franchise tax or annual report	Delaware Division of Corporations	Franchise tax and annual reports are not the same as personal income tax assistance.
Federal refund, IRS transcript or EIN issue	IRS	Delaware Revenue cannot access federal IRS account systems.
Driver license, vehicle title or driving privilege card process	Delaware DMV, with Revenue tax certification only where required	DMV services are separate from state tax filing.
Unemployment insurance or paid leave credentials	Delaware Department of Labor / LaborFirst	Employment systems are separate from the Division of Revenue tax portal.
Local property tax bill	County, school district or local government	Property tax billing is not the same as personal income tax filing.

Best shortcut: use Delaware Revenue for tax filing, refund, portal, gross receipts, withholding, corporate income and collections. Use One Stop for business licensing. Use Division of Corporations for corporate franchise tax. Use IRS for federal tax.

Delaware Taxpayer Security: Refund Text Scam, Portal Safety and Email Caution

Tax account pages involve sensitive identity, payment and business information. Delaware Revenue warns that it does not send text messages about tax refunds. Start from official Delaware government pages and do not enter banking details through links from unexpected texts.

Safe taxpayer checklist

Type official portal addresses yourself or use official Delaware.gov links.
Do not respond to refund text messages.
Do not send full SSN or banking details through ordinary email.
Keep portal passwords private.
Save filing and payment confirmations.
Verify suspicious notices through official phone numbers.

Common scam signs

Text claims a Delaware refund is waiting.
Link asks for bank or debit card information.
Caller demands immediate payment by gift card or crypto.
Email asks for portal password.
Message uses pressure, threats or unusual spelling.
Phone number does not match official Revenue contacts.

Individual Taxpayer Scam Warning Official Contacts Fraud Hotline

Official Delaware DOR Sources and Safe Links

Use these official resources for final confirmation before filing, paying, checking a refund, registering a business, mailing documents, calling Revenue or responding to a notice.

Division of Revenue Taxpayer Portal Delaware One Stop Contact Information

Internal link status

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Editorial method

This page organizes official Delaware Revenue, Taxpayer Portal and One Stop workflows into a user-first guide. Final legal, payment, filing and account decisions should always be verified on official Delaware pages.

Delaware Department of Revenue FAQs

Visible FAQs below match the FAQPage schema included at the end of this article.

What is the Delaware Department of Revenue?

Most people mean the Delaware Division of Revenue, the Department of Finance division that handles Delaware tax administration, filing, refunds, payments, business taxes and taxpayer assistance.

What is the official Delaware Division of Revenue website?

The official Delaware Division of Revenue website is revenue.delaware.gov.

What is the Delaware Taxpayer Portal?

The Delaware Taxpayer Portal is the official online system at tax.delaware.gov for filing, payments, refund status and many individual and business tax services.

What is the Delaware DOR phone number for personal income tax?

The Delaware Division of Revenue lists Personal Income Tax Assistance at 302-577-8200.

How do I check my Delaware tax refund?

Use the official Check Refund Status tool and enter your SSN or ITIN and expected refund amount.

How long can a Delaware refund take if it is pending?

Delaware Revenue says personal income tax refunds requiring manual review or additional documentation may take 10 to 12 weeks to process.

Does Delaware send tax refund text messages?

No. Delaware Revenue says it does not send text messages about tax refunds.

Does Delaware have a state sales tax?

No. Delaware does not have a general state sales tax, but businesses may still owe gross receipts tax, license tax, withholding tax or other taxes.

What is the Delaware One Stop portal?

Delaware One Stop is the registration and licensing portal for businesses operating in the State of Delaware.

What is the Delaware business license phone number?

Delaware Revenue lists Business License Assistance at 302-577-8778.

What is the Delaware gross receipts tax phone number?

Delaware Revenue lists Gross Receipts contact at 302-577-8780.

What is the Delaware withholding tax phone number?

Delaware Revenue lists Withholding Tax contact at 302-577-8779.

What is the Delaware corporate tax phone number?

Delaware Revenue lists Corporate Tax Refund and Returns at 302-577-8781 and Corporate Tax Auditors at 302-577-8783.

Who handles Delaware corporate franchise tax?

Delaware corporate franchise tax and annual reports are handled through the Delaware Division of Corporations, not the normal personal income tax help path.

What is the Delaware collections phone number?

Delaware Revenue lists Collections and Account Management at 302-577-8785.

What is the Delaware installment payment phone number?

Delaware Revenue lists Installments at 302-577-8586.

Where do I mail a Delaware refund return?

Delaware Revenue lists personal income tax refund returns to P.O. Box 8710, Wilmington, DE 19899-8710.

Where do I mail a Delaware balance-due return?

Delaware Revenue lists personal income tax balance-due returns to P.O. Box 508, Wilmington, DE 19899-0508.

Can Delaware Revenue help with IRS federal tax questions?

No. IRS refunds, federal transcripts, EINs and federal notices generally belong to the IRS, not Delaware Revenue.

Is this website the official Delaware Division of Revenue website?

No. This is an independent informational guide. Use official Delaware Revenue, Taxpayer Portal and One Stop pages for filing, payments, refunds, licensing and legal tax decisions.

Final Recommendation: Use the Correct Delaware Tax Portal Before You Call

For Delaware state tax filing, refunds, payments and login help, start with the official Delaware Taxpayer Portal. For business registration and license actions, use Delaware One Stop. For personal income tax phone support, use 302-577-8200. For business license, gross receipts, withholding, corporate, collections and refund accounting questions, use the dedicated Division of Revenue numbers. Do not confuse Delaware Division of Revenue tax filing with Division of Corporations franchise tax, IRS federal tax or DMV services.

🔐 Taxpayer Portal ☎️ Official Phone Numbers 📝 Delaware One Stop

Last editorial update: June 7, 2026. Verify final filing deadlines, refund status, payment instructions, phone numbers, portal availability, forms and legal tax details on official Delaware Revenue pages.