- 19April 19, 1553No events
- 20April 20, 1553No events
- 21April 21, 1553No events
- 22April 22, 1553No events
- 23April 23, 1553No events
- 24April 24, 1553No events
- 25April 25, 1553No 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.
