2024 Washington DC Form D-40

What Is Washington DC Form D-40?

Washington Form D-40 is used by full-year residents of the District of Columbia to file their individual income tax returns. The purpose of Form D-40 is to calculate how much DC income tax you owe for the year. Part-year residents who moved into or out of DC during the tax year will also file Form D-40, but they must fill out the Part-Year Resident section on the return. Nonresidents with DC-sourced income typically file Form D-40B to claim a refund of state income tax withheld or paid by declaration of estimated tax. Read the Other forms you may have to file section of the 2024 DC Form D-40 instructions to determine if you should file D-40 or if another DC form might apply to your situation.

Who Must File Washington DC Form D-40?

If you are a DC resident for the entire year and are required to file a federal income tax return, you will generally need to file Form D-40. DC also applies certain residency rules based on time spent in the District, so if you lived in DC for at least 183 days in 2024, you are considered a resident for tax purposes. Check the Who Must File section of the 2024 D-40 instructions for the specific requirements and exceptions.

Even if your income is below the filing threshold, you may still want to file if any DC tax was withheld or if you are eligible for a refund or credit. The District provides various credits, including a DC Earned Income Tax Credit (DC EITC) that generally follows the federal EITC rules. Read the credits section of the 2024 DC D-40 instructions to see if you qualify for DC EITC or other credits, such as property tax or low-income credits.

Printable Washington DC State Tax Forms

Printable Washington DC D-40 Instructions

How do I check my DC tax refund?

To check the status of your Washington DC D-40 income tax return online, visit the District of Columbia Office of Tax and Revenue website and use their Refund Status Inquiry service. District of Columbia Office of Tax and Revenue states that a timely filed error-free state income tax return takes about 2 to 3 weeks for processing and issuance of a refund check. Filing your Washington DC tax return on paper may cause additional delays, especially during peak filing periods.

To check the status of your Washington, DC income tax return for 2024, you will need the following information:

• Social Security Number
• Requested Refund Amount

The requested information must match what was submitted on your 2024 Washington DC Form D-40. The District of Columbia Office of Tax and Revenue refund lookup service can only be used to query the current state income tax year 2024. Contact the District of Columbia Office of Tax and Revenue service center by phone or mail if you are having trouble using the service or need to discuss a prior year's state income tax return.

To contact the District of Columbia Office of Tax and Revenue service center by phone or email, use the check your refund status link above. Alternatively, read or print the 2024 Washington DC Form D-40 instructions to obtain the proper phone number and mailing address.

Last updated: January 18, 2025

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