You can easily finish a project by clicking the Finish Project button in the project detail.

Finish Project
After clicking Finish Project, a confirmation dialog will appear.

Information about missing project billing
This dialog informs us that we haven't fully billed the project yet. As seen in the Project Overview, we've only billed $ 2,000 so far. Costlocker wants us to confirm the remaining amount.
We have two options:
1. Keep the Project Open
In this case, nothing happens; we manually adjust the Project Billing to ensure the total project revenue is billed, and then we finish the project.
2. Let Costlocker Bill the Project for Us
In this case, by clicking the OK, Agree button, the following changes will occur: