We give clients discount vouchers of a specific value - $20, $88, $188 - which can be redeemed for goods sold, but no change is given if the value spent is less than the value of the voucher.
Initially the vouchers were set up as a "tender type" but based on this the GST charged to the customer was calculated based on the total value of the goods sold, not the after voucher value which resulted in us having to pay $1.4 (7%) in GST for consideration that we never received - as is printed on the customer receipt.
On suggestion of our provider to solve this problem we created a "product" with a negative value. This works well, except where the voucher value exceeds the cost of the goods purchased. In this case there is negative GST and a "refund due to customer" on the till slip - which shouldn't happen.
Our vouchers are controlled by serial numbers and the sales staff are required to enter in the serial number of the sales voucher presented.
What is the best way to set up the vouchers so that the sales tax is recorded correctly as well as the total amount of the invoice (ie no refunds paid to customer) and the voucher number is recorded?
Thank you
Kim