Thanks for posting the Community space, @Holly31.
You can inactivate the Customer job so it won't show up on the WIP and job costing reports in QuickBooks. I'll guide you how:
Once done, the job is hidden and no longer listed in the Customers and Jobs list.
In case, you want to make the job inactive again just click All customers from the drop-down list.
I've also added these articles about customizing reports and job costing. It provides specific custom reports you can create in QuickBooks:
Add a comment below if you have additional concerns. I'm here to keep helping. Have a great day!