One of my clients issues T4a's for student allowances.  The allowances are coded as T4a other in the earning setup and when we print the hard copy it we can tick on Other information, Print Totals and we can specify the box 105.  However, when we went to E-file them, there is only the option to tick on to Print other information and nowhere I can see to specify which box.  

They E-filed the T4a's and they were rejected by CRA because the other information is assigned to box 28 rather than 105.

My question is how do we specify the box so it will be accepted by CRA.  Any suggestions are welcome.