The Profit & Loss report is a very helpful report when it comes time to filing your income tax returns.
Here, you can see your income and all of your expenses by category for a custom period of time. You can also filter this report by brand (if you have multiple brands) and/or by a particular job type.
You can find the Profit & Loss report in the Accounting section here in Reports.
NOTE: In order to view this type of financial information, you must be an administrator user.