You can create a sales report in several ways:
Export
Go to Tools > Exports via the left menu of the back office.
Click on New Export at the top right of the screen.
A pop-up window will open where you can choose to make an export of your Orders, Invoices and Sales.
You can then download the export. The export will also be sent to your email.
Statistics
You will find the sales statistics under Statistics in the left menu of the back office. You can set different periods here. Click here for more information.