What is a payment schedule?

The security of payment Act in each state gives them a window to serve one, counted from the day your claim was served.
If they miss the window, that Act sets what follows, not your contract.
It must state the scheduled amount. If that is less than you claimed, it must give the reasons for the difference.
Read a schedule with no reasons closely.
A payment schedule is not agreement, and it is not the end of the matter.
The shortfall has a next step. That step has its own window, which usually runs from the day the schedule reached you.
In YourCA, record what came back against the claim it answers, in Financials. YourCA works out every difference. You do not type one.

Worth knowing

The window, and what happens when nobody answers, are really different in each state. So YourCA works both out from the state the job is in, and shows you the section it came from. If the job records no state, YourCA refuses to give the date. It does not estimate it.