- 27December 27, 1648No events
- 28December 28, 1648No events
- 29December 29, 1648No events
- 30December 30, 1648No events
- 31December 31, 1648No events
- 01January 1, 1649No events
- 02January 2, 1649No events
A=ANNUAL
M=MONTHLY
Q=QUARTERLY
DISCLAIMER: THESE DUE DATES ARE SUBJECT TO CHANGE. WE WILL DO OUR BEST TO KEEP THIS CALENDAR UP TO DATE WITH THE EVERCHANGING DEADLINES. ANY STATE FILING DUE DATES ARE IN REFERENCE SPECIFICALLY TO THE WASHINGTON STATE DEPARTMENT OF REVENUE.
