To get a report of the taxes paid over a given period, you should
1. Create a booking report in Marketing> Reports> Bookings.
2. Click on the Download as xls button, then open the spreadsheet.
3. The report will show taxes set up in Settings>Taxes in separate columns. You can use Excel filters to filter the report as needed, and use the AUTOSUM function to calculate total taxes collected over a given period.
The system will allow to generate reports for data over maximum 3 months at a time. If needed, you should combine data from multiple sheets.