- 21April 21, 1946No events
- 22April 22, 1946No events
- 23April 23, 1946No events
- 24April 24, 1946No events
- 25April 25, 1946No events
- 26April 26, 1946No events
- 27April 27, 1946No 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.