October
15
- Monthly-filers
Form 941 federal tax deposit due
- DC
sales tax return and payment due, quarterly and monthly filers
- Maryland
income tax withheld return and payment due, monthly filers
- Federal,
DC and Maryland Individual Income Tax Returns final due date, if Form 2688
or additional extension was filed
20
- Virginia
and Maryland sales tax return and payment due, quarterly and monthly filers
- DC
income tax withheld return and payment due, quarterly and monthly filers
31
- Form
941 due
- Virginia
income tax withheld return and payment due, quarterly and monthly filers
- Maryland
income tax withheld return and payment due, quarterly and monthly filers
- State
unemployment tax returns and payment due
- Form 940
federal tax deposit due