File Washington DC Form D-40
Prepare Form D-40 now with e-File.com
E-Filing Options: e-File.com - TaxAct
Washington, D.C. residents who filed a federal tax return must file a return with Washington, D.C. using Form D-40, the long Washington DC Individual Income Tax Return. Part-year residents also file Form D-40, while nonresidents should file Form D-40B.