You can propose new dates if you cannot approve the dates submitted by the contractor. Go to the Schedule page of the relevant job and click on Action and then click on Propose new dates:
The contractor will be notified that new dates have been proposed. They need to approve / agree to the updated dates via PermitMonitor. If they disagree, they may counter back with dates of their own. Once a consensus on the dates is reached the traffic light will turn green on the left-hand panel.
You can propose new dates throughout the permit process if anything changes.