How do I change my billing address for steam wallet?

[jawadanamny09]

I recently moved from Pennsylvania to Delaware and would like to take advantage of my no sales tax privilege however I do not know how to change the billing address for steam wallet when I do it during checkout it resets to Pennsylvania please help

[cSg|mc-Hotsauce]

You make a purchase using an external payment method with a billing address tied to it from the new address.