- 17October 17, 1999No events
- 18October 18, 1999No events
- 19October 19, 1999No events
- 20October 20, 1999No events
- 21October 21, 1999No events
- 22October 22, 1999No events
- 23October 23, 1999No 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.