- 19February 19, 1950No events
- 20February 20, 1950No events
- 21February 21, 1950No events
- 22February 22, 1950No events
- 23February 23, 1950No events
- 24February 24, 1950No events
- 25February 25, 1950No 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.