To add new group account numbers- This can be done under Manage – Warehouse Domains and add the new code with the name and description there. There is no additional step needed to add names and descriptions. The code for Group account is W_GL_GROUP_ACCOUNT.
There is no additional place where you need to add names. Whenever you add new codes under Manage – Warehouse Domains, you can add the name and description there itself.
As far as W_FIN_STMT (Financial Statement) is concerned, we don’t allow that domain to be extended and hence you have to use the existing members.
If you want to map the new group accounts to fin stmt, navigate to Manage Domain Mappings and Hierarchies and apply the appropriate filters. For the domain code filter, please use W_FIN_STMT and you should see the mapping between group account and fin statement under the Warehouse Domain Hierarchies tab.