Balance Load Adjustments

Summary: We are new to Oracle, and have been told that when we have an acquisition that requires we produce a W2 we will need to upload via the balance load adjustment. We were given a sample template of the Balance Adjustment Line. Here are the lines and example that we've been given. Other samples I've seen do not have all these fields. My question is are the fields at the end of the lines, SourceSystemId, SourceSystemOwner and BalAdjGroupId in the 'header' area required. And for the line detail, is BalAdjLineId, SourceSystemId and SourceSystemOwner required? Please see my attached example.