To achieve the requirement of only single currency journals being entered for this company, you should enable “Limit a Journal to a Single Currency” on both ledger options and journal sources. Ledger options are settings that apply to a specific ledger, such as journal processing options, currency options, and average balance processing options. Journal sources are identifiers that indicate where a journal originated, such as manual entry, subledger accounting, or import. You can enable “Limit a Journal to a Single Currency” on both ledger options and journal sources using the Specify Ledger Options and Manage Journal Sources tasks in Setup and Maintenance. This will enforce single currency journals for journals entered on the Create Journal page and for journals that are imported. You do not need to enable “Limit a Journal to a Single Currency” on journal lookup codes, as these are codes that indicate the status of a journal, such as Entered, Posted, or Reversed. You do not need to enable “Limit a Journal to a Single Currency” on journal category, as this is an attribute that classifies journals by purpose or function, such as Purchase Invoices or Allocations. You do not need to enable “Limit a Journal to a Single Currency” on profile option, as this is a setting that affects the behavior of an application or feature for a user or responsibility. Reference: Oracle Financials Cloud: General Ledger 2022 Implementation Professional Objectives - Define Ledgers 12