After checking the adjustments is not 0, check if the sum of "Prepayment" and "Adjustment" are equals to 0.
If they are equals, then the return is ok. Go out
If they are not equals, then go to the next validation "SUM Adjustment and Tax imported" columns
After checking the adjustments is not 0, check if the sum of "Prepayment" and "Adjustment" are equals to 0. If they are equals, then the return is ok. Go out If they are not equals, then go to the next validation "SUM Adjustment and Tax imported" columns