If you're looking for a report on the Stripe fees you've paid, you can download the balance history report and filter for the time period you're looking for.
Open the CSV in the spreadsheet program of your choice. One column in the sheet will contain the fees associated with each transaction. Total this column up and you'll have the total amount of fees that you've paid for the transactions you processed in your selected time frame.
In certain countries, Stripe will generate an invoice for the fees you’ve incurred each month which you can use for tax purposes. Refer to our guide on downloading your tax invoices for more information.
If you’d like to retrieve the fees for a given payment programmatically, you can use the Stripe API. Follow the guide in our docs for more details.