In this IMG activity, you can maintain the properties of the account assignment categories. You can determine which fields are assigned during shipment cost processing as mandatory, optional, display or greyed-out fields.
For automatic determination of a G/L account, the account modification field must be filled.
Also make sure that these settings are also compatible with the settings for the field status groups of the G/L account determined. The settings for the field status groups are made in Customizing for Financial Accounting (FI).