How do I setup a job number & name to sales, purchase invoices & labour to enable me to run a job report which will indicate a net amount

Hey colin6,

Thanks for your post and welcome to the community!

Our Plus package includes a Project feature which allows sales and purchase transactions to be assigned to jobs, and gives access to additional reports including the Project Profitability report which shows the net income, total expenses and gross profit. 

You can see more about setting up and using Projects in QuickBooks Online here, feel free to post any further questions below and we'll get back to you :)