@Mario B thank you for your response.  This did not work.  I have tried every which way possible.  I am trying to file them with the link you sent.  I am trying to file a clients amended T5.  After I create the XML file with our account number in the Transmitter info it rejects the upload because the account number does not match.  Reading on the link you sent under "Filing with Internet File transfer" Steps02 = Have your account number and Web access code (WAC) associated to this number.  We are an accounting firm that files tons of T5's and T4's.  We do NOT have any of their web access codes.  How to I get this 2023 amended T5 slip get filed?  This has been an extremely difficult, time consuming task.