Postal Code

Go to System → Settings → Store Details

Postal (ZIP) Code of store origin. Currently, it is for information only and not used to calculate the tax rate for products sold. Displayed on contact us page

Please note some extensions like https://abantecart.atlassian.net/wiki/spaces/AD/pages/17236073/FedEx, Avatax, https://abantecart.atlassian.net/wiki/spaces/AD/pages/17661953/USPS may have own setting for “origin” or “shipping from” zip code