Buying DLC with XB1 50$ card

I got my XB1 before 4 days and i created a new account and i have used the 14.days trail for xbox live (gold) and i redeemed the 50$ card and when i try to get a pack it tells me to put the billing info of the card and i dont know how to buy using the 50$ card and when i check my balance it says that i got 50,00$ in my account so please help me thank you.

It will automatically put the $50.00 towards the purchase but there is tax on the purchase. So you need a cc or more on your account.

It will automatically put the $50.00 towards the purchase but there is tax on the purchase. So you need a cc or more on your account.

Thnx figured what the problem was !