For some reason ATO does provide Premium and Rebate amounts as $808 and $808 accordingly. But to lodge the IITR rebate amount should be less than premium. It is an ATO rule and cannot be avoided.
Kindly check amounts with ATO or your client and fix it.
Otherwise, try codes “E - Spouse claiming your share of rebate” or “F - Covered as dependent child” can be selected if applicable. It will allow equal premium and rebates.