You must record the usage of jobs in the job journal. You invoicing the customer for job costs with a sales invoice. If you sell items to a customer during a job, you can post the items in the job journal, as well.
Open the Sales Invoice window to create a new invoice.
In the Sell-to Customer No., enter a customer number. Then enter a date in the Posting Date field.
Select the sales lines. Click Functions, Get Job Usage.
In the Get Job Usage window, fill in the fields. For Help about a specific field, click the field and press F1.
Click Posting, Post to post the invoice.
Recording Job Usage
Posting Job Sales before Usage
Issuing Credit Memos for Jobs
Viewing Job Ledger Entries
Applying Job Entries Manually