When you purchase a product for your points you will be taxed for the benefit value of your product/s and that will be shown on your salary. The total benefit value is shown in cart and checkout. Depending on your tax rate the amount that will be deducted from your salary is approx 30-50% of the benefit value if you choose items. If you choose cash that will be treated as normal salary.
To read more about how benefits work please visit: