- 1st Quarter - February 1st
- 2nd Quarter - May 1st
- 3rd Quarter - August 1st
- 4th Quarter - November 1st - extended to November 12, 2019 by 4:00 p.m.
Each quarter has a 10-day grace period which includes the due date. If the 10th falls on a weekend or holiday, the grace period is automatically extended to the next business day.