You can't seperate out your income and generate such a report in Shopify. But you emphasised a very crucial accounting need. As of today, Shopify merchants are using the top accounting softwares like QuickBooks Online or Xero for this. when you enter or sync your Shopify data into the accounting software, it will generate Shipping income reports, Tax reports and more.
The customization in these sofrwares allow you to generate reports for any qurater or time period of your choice as well. To focus on reporting, you can choose an app to integrate Shopify and accounting software in the app store.
I will be glad to answer any more questions you have. Hope this helps.
Alternatively, you can always try doing an order export for the date range you are looking at :)
You can pull information such as your revenue amounts, shipping costs and taxes all from the spreadsheet it generates.