Hi Andy,
Welcome to Clear Books and thanks for posting this question.
You may find it useful to organise your income and expenditure into Projects, if your company works on a project basis. This would allow you to allocate an invoice/bill to a particular project and generate a separate Profit and Loss report for each project. I have linked below the link to our Support guide, containing more information on this topic.
https://www.clearbooks.co.uk/support/guides/projects-settings-2/how-to-create-a-project/
If you would like to discuss any particulars relating to your account, please feel free to send a ticket in to our Support Team and we will be happy to help.
All the best,
Mia