Currently, in Workflow Designer, it is possible to pre-fill columns in a dialog table with the remaining amount by referencing a system or index field that holds the total amount. However, it is not possible to use a dialog field for this purpose.
To improve flexibility and usability — especially for scenarios like account assignment in an incoming invoice workflow — it should be possible to select a dialog field as the source for the total amount. This would allow the remaining amount to be dynamically calculated based on user input at that specific workflow step.