1. Accessing the Accounting Module In Odoo, start by accessing the Accounting module. This module centralizes all financial operations, including managing accounting periods, journals, and the RAN (Annual Net Accounting). Ensure that you have sufficient access rights to make structural changes. 2. Creating Accounting Periods For a monthly approach, create monthly accounting periods in the settings. This allows Odoo to segment entries by month and generate periodic financial statements. For an annual approach, a single period is sufficient, covering the entire fiscal year. 3. Setting Up Fiscal Years In the Settings > Fiscal Years menu, define the start and end dates of the fiscal year. For the monthly approach, it remains annual, but interim closings are simulated using periods. For the annual approach, the closing occurs only once at the end.