You can find Business Reports under the Reports tab in your seller account. The following types of Business Reports are available: Sales Dashboard, Business Reports by Date and by ASIN, and Amazon Selling Coach. Data for these reports are generally available for up to two years.
The Business Reports section offers a variety of reports. Available reports are listed in the left navigation bar. Available data columns for Business Reports (but not for the Sales Dashboard) are in the right navigation bar. To add or remove columns, select or deselect the corresponding checkboxes. If you do not see the right navigation bar, move the mouse over to the far right. Click the vertical tab labelled Columns to keep the list visible. Click the handle again to hide it.