Problem
You need to invoice a customer for half of a job's total initially and add the remaining half to the invoice at a later time.
Solution
Use Project Invoices
Add the job to a project.
Go to the project and select Add Invoice from the Actions menu.
Create a new invoice and add a task for 50% of the amount.
Send the invoice to the customer.
After receiving payment, unapply the payment from the first invoice and apply the payment to the final invoice.
Note: If your account does not have the Add Invoice option in the project actions menu, consider collecting the deposit on the sold estimate. For more, see Collect a payment or deposit.