When creating an invoice for a service contract payment, you can include more than one payment milestone of the same contract.
The process for creating an invoice remains the same as before: either can be accessed from the Payments tab in the Contract details view, the Accounts > Clients page, or the Billing > Invoices page.
Check out this article for more details.
In the invoice creation modal, you will see the following additional options:
A plus icon below the row for the next milestone to add more milestones from the contract.
A dropdown next to the payment milestone to select from the various payment milestones.
A minus icon to delete any payment milestone.

