ledger
A ledger is a book or table that is used to track the finances of a business or organization. It is usually divided into different sections, including the balance sheet, the income and expenses, and the cash flow.
The ledger was full of mistakes, because the accountant was not properly tracking the finances.
The accountant is going to have to make a lot of changes to the ledger, because it's not reflecting the actual state of the company's finances.