The TransactionDate field is null in some records.
So it would look something like?:
Date: IIf(Len(Format([TransactionDate],"yyyy") & "-" & Format([transactionDate],"yy")+1)=0," ",(Format([TransactionDate],"yyyy") & "-" & Format([transactionDate],"yy")+1))
In the IIF statement, how do I tell...