You can find an online report on the income and expenditure of your company over a specified time period in the Web Portal.
Go to Reports > Income & Expenditure.
By default, the initial report that you will see will be the one for the current financial year (July 1 - June 30), however you can change the date range that you would like to view, in the date options at the top of the report. Select the dates and then Apply Filter.