How do I change my billing. I have a new card.

This is the iTunes Store forum, it uses your account payment info and is changed by following the steps in the support document I linked to above.

Do you mean your physical item orders from the Apple Online store?

If so then log in to your account at https://secure2.store.apple.com/shop/account/home and scroll down to Payment, then click on Edit under Payment Method.

You can also edit that at https://appleid.apple.com

Follow the steps here: link-> Change, add, or remove Apple ID payment methods - Apple Support

I want to change my payment method in my orders, i dont need to change this in my account, but i dont see button for this. How i can change my card for making a purchase?