There is 3 types of reports for expenses.
Yearly report for all expenses including categories.
To view full expense report navigate to Reports -> Expenses Report
Detailed Report.
To view detailed report for expenses where TAX and TOTAL TAX is included with ability to filter navigate to Reports->Expenses Reports and click on the Detailed Report button
Expense vs Income report.
To view Expense vs Income report navigate to Reports -> Expense vs Income
Expense vs Income report is show in your base currency. If you have payments in other currency the result wont be accurate 100%