Telephone Numbers: District of Columbia Customer Service Center, Business Tax Service Center. Unemployment Insurance (202) 724-7000.

Business Tax Service Center. At this site, you may file tax returns, remit payment via credit card or electronic funds transfer, view account balance information, and correspond with the District of Columbia Office of Tax and Revenue. Register to calculate and pay your District taxes electronically.

Online registration, instead of using Form FR-500, Combined Business Tax Registration Application, register online for withholding tax and unemployment compensation tax.

Business tax forms. Click the Business list button and scroll down to forms for withholding for the District of Columbia.

Register to pay income tax withholding electronically

Form FR-900W, FR-900W1, or FR-800S, Change of address for withholding; final report; change of address, sales and use tax. Click the Business list button and scroll down to forms for withholding or for sales and use tax. Click a form and you'll see a page that lists several forms. Click the form you want.

New hire reporting: register to report online.

Workers' Compensation. Information and forms.