In order to mark a job complete, all products must have a completion date, the job completion date must be filled out, and the job status must be set to "complete."
How to log a product completion date:
Bring up the customer's job. Click "Details" next to the product.
Locate the Product Completion Date drop down and choose a date. Click save at the bottom of the page. 
How to change the job status to "Complete" and log a job completion date:
Bring up the customer's job. Click the blue edit pencil to the right of the job to edit job details.
Change the job status to "complete" and enter in the job completion date. Click save at the bottom.
