We have customized the Sales Invoice form . So when we select the order (Customized lookup field) all the informations are copied from blanket Order to the current invoice form (replicated the existing Copy Docu Functionality). But the exchange rates are wrongly entered without checking the current invoice date . All the Amount (LCY) fields are posted with the wrong exchange rate. So i would like to correct all the wrong data with the exchange rate of current posting date . But when i correct the data in GL Entry i couldn't find out the proper link with other tables. So please help me out for the proper link between Sales Invoice Line and GL Entry to update the invoice related records in GL Entry.With out document no any other unque link is available ? or can we connect through any other tables like Cust.Ledger Entry ,Value Entry & Detailed Cust.Ledger Entry.