Reimbursements on T4A

Is there a way to remove reimbursement payments from generated T4As?

I have some contractors who we occasionally have to reimburse for purchases. These are not considered income but Sage includes the payment in the total it generates for Box 20 of the T4A. Anyone have any insight on this? Maybe somehow linking an expense account to Box 20 so it is only pulling, for example, account "5412 Contractors" into that box?