Follow the link and choose the DC D-4 Employee Withholding Allowance Certificate from the list, which you will use to designate your withholding allowances if you live in the District of Columbia.
You can send the completed form and any required attachments by fax to (202) 566 -5001 or by mailing your documents to:
DC Retirement Board
Member Services Center
900 7th Street, NW, Second Floor
Washington, DC 20001
If you have further questions, please contact the DCRB Member Services Center by clicking on the Ask Member Services link, or by phone at (202) 343-3272 Monday – Friday from 8:30 am to 5:00 pm.