When extending a G/L account to a new company code in SAP, it is essential to maintain certain mandatory fields even if all customizable fields are set to optional in the field status. These fields ensure that the account is properly configured for financial transactions. * Account Currency: This field specifies the currency in which the account is maintained. It is crucial for financial reporting and transaction processing. * Transaction Code: FS00 * Steps: * Enter the G/L account and the company code. * Navigate to the "Currency/Tax" tab. * Enter the appropriate account currency. * Field Status Group: This field controls the input fields during document entry. It determines which fields are required, optional, or suppressed. * Transaction Code: FS00 * Steps: * Enter the G/L account and the company code. * Navigate to the "Control Data" tab. * Select the field status group relevant to the account. Without maintaining these fields, the G/L account setup will be incomplete, and you will encounter errors during transactions. References: * SAP FICO documentation: "Field status group and account currency must be maintained when extending a G/L account to a new company code to avoid errors for incomplete data". General Ledger Accounting