I have transactions on customer/vendor accounts which are part of a treasury interface. Interface credits/debits bank, debits customer/vendor account. Normally we would raise invoices to clear. Treasury interface is not working correctly so all codings are incorrect. What I need to do is reverse all the transactions and re input by journal upload. I have tried using FB08 to reverse the transactions but found out I cannot use this as there are cross company transactions and I can't alter other entity ledgers.
I have tried using an upload sheet using Y1,Y2,Y3,Y4 rather than 40 50 but I am using the control accounts code in the G/L and again it doesn't work.
What is the best way to do this and can someone help with advice?