On the Title tab of any document, define your own department(s), at which, as a result of forming the document, the balances will change.
To select a department:

The list of departments that can be selected in the document can be limited for the user.

The restriction is imposed by the Department group available to the user and the Reflect department groups in department dictionary flag being set.

When selecting a department, the KPP field will be automatically filled in with the default” value from the department card, if the KPP is filled for the department.

The department KPP must be filled out if the organization operates on the territory of the Russian Federation.