An accounting tool may be used to manage financial data for an organization. The accounting tool may support the closing of accounting periods for the finances of the organization. The accounting tool may be configured to receive a request to modify a transaction of a closed accounting period. The accounting tool may be configured to create a changed version of the transaction according to the modify request, and to maintain a previous version of the transaction that does not include the requested modification. A separate transaction may not be required, even though the modified transaction was initially recorded during a closed accounting period. In addition, the accounting tool may be configured to provide a plurality of views of the closed accounting period, e.g., a first view that comprises the previous version of the transaction, and another view that comprises the changed version.