1. Go to My Office -> My Projects.
2. Open your current project and press "Complete Project" in top menu.
3. Give Feedback to the service provider.
Note: You will not be able to complete your project until you give feedback to the provider.
More information on providing feedback
4. After providing feedback and confirming that you have no claims concerning the provider's work, you can click the button "Complete Project". Please note that after you complete the project the whole amount of money for the project will be transferred to the provider's account.