Can someone please explain how these vouchers works?
Do i need to pay Taxes or airport fee or its all included?
You do pay taxes but it's only for one days worth so say you rent for 7 consecutive days (in one reservation) you'd only be paying one days worth in taxes for the whole weeks rental
Does it matter which location i take it?
IME you can only rent from an airport (correct me if I'm wrong)
Which grade car is it for?
You can reserve up to a premium