The Business Snapshot report can only show the current year's data and the comparison for the previous year. You can run the Profit and Loss year-to-date comparison report and customize the date range. Though, the previous years' data will be shown in total versus the current year-to-date.
Here's how to run report:
In the left pane, Click on Reports tab.
Search for Profit and Loss year-to-date comparison.
Click on Customize button.
Choose the date range.
Click on the Run report button.
Comment below if you have any other questions. Have a good day!