add new billilng information

From: If you need to change or update your Apple ID payment method - Apple Support

Update your payment method on your Windows PC or Microsoft Surface

1. Open iTunes.
2. In the menu bar at the top of the iTunes window, choose Account, then choose View My Account.
3. Choose Manage Payments. (If you're using an older version of iTunes, tap or click Edit next to Payment Type.)
4. Choose Add Payment. 
5. Enter your new payment method, then choose Done.