remove wallet balance

Seems Wallet does not have a balance. Wallet holds cards etc. for use with Apple Pay etc.

Wondering if it is your Apple ID Account balance you want to make zero.

If so, there are a couple of ways available:

(1) You can purchase an item that costs more than your balance and use a payment method for the rest.

or

(2) You can ask iTunes to just make yourr balance zero for you, losing whatever money makes up the balance:

ie: Start with the "Get Support" link at the bottom of their web=page:

iTunes - Official Apple Support

Then choose Apple ID,

Then there'll be a list of options to choose from .. choose the one nearest to your request.

All the best :-)