The chart of accounts is located in the GL Accounts module: navigate to Accounting > GL Accounts.
GL Accounts - List View (Chart of Accounts)
Click any GL Account to display the detail view.
GL Account - Details View
At the details view for an account, you can review the transaction list and the monthly activity:
Check Register Tab (Transactions List)
To display the details view for a transaction, click the Go-To button (>) next to the Transaction ID.
Monthly Activity Tab