- 08September 8, 1816No events
- 09September 9, 1816No events
- 10September 10, 1816No events
- 11September 11, 1816No events
- 12September 12, 1816No events
- 13September 13, 1816No events
- 14September 14, 1816No 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.
