In certain countries, accounting regulations require you to lock transactions to prevent anyone from making changes to them. NetSuite provides the following two methods for locking transactions:
GL Impact Locking - This option locks subsidiary transactions where the general ledger impact of a transaction must be locked to the general ledger. For more information, see GL Impact Locking.
Transaction Locking SuiteApp (Bundle ID 8791) - This SuiteApp is available at no cost. Contact NetSuite Customer Support to request access to the Transaction Locking SuiteApp. For more information, see Transaction Locking SuiteApp.
For more information, see Installing a Bundle.