- 12August 12, 1956No events
- 13August 13, 1956No events
- 14August 14, 1956No events
- 15August 15, 1956No events
- 16August 16, 1956No events
- 17August 17, 1956No events
- 18August 18, 1956No 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.