While recording Sales return journal how to select the tax code "GST on sales"? Allows to select the tax code "GST on purchase" which will give wrong report at qrt end?

Similarly, when there is purchase return (cash received), QBO only gives an option to select "GST on sales" instead of providing me option to select "GST on purchases". On the initial purchases, "GST on purchase" tax code was used, it would give fair reporting if we can opt the same tax code selected while recording the initial purchase (i.e. "GST on purchase")