To add a new attribute, do the following:
Navigate to Maintenance and Hierarchy Management.

Click Edit Hierarchy to open the Hierarchy Management interface in Edit Mode.

If your Default View is set to Edit Mode, the interface will automatically open in Edit Mode.
Under Hierarchy Selection,
Select Type as Finance Hierarchies.
Select the Hierarchy to which you want to add the Attribute (for example, Account)

Click Setup.

Click Attributes Setup. The Finance Attributes page appears.
Click the Add button to add a new Attribute. The Add Attributes page appears.

Enter a Name. For example, Reporting_Manager. Optionally you can also add a Description.
Select the attribute Type. Enter the Values for the attribute. For the Reporting_Manager attribute here, the attribute type is selected as List. So enter the values accordingly.

Click Save.
The financial attributes created in the Attribute Setup section are available under the User Defined Attributes properties of the leaf-level members in the Main Hierarchy. You can assign values to these attributes for the desired members to improve financial reporting and analysis.