How to populate the new custom attribute (which is system date)?

Summary:

We have a requirement to create a calculated date type attribute in Recon Compliance in ARCS application. The attribute will be part of recon compliance and it will be added to capture data for balance explanation/adjustments. Requirement is whenever a transaction is being created on selecting a list of items (R/L/T) the attribute should default to capture the current system date.

Content (please ensure you mask any confidential information):

When prepare selects one of the list items (R/L/T) then new custom attribute (which is system date) will populate.

Version (include the version you are using, if applicable):