Adding multiple zip codes faster?

Hi everyone!


So, our accountant and the IRS have instructed us that we need to add every single California zip code to our Shopify tax settings, even though we don't have a physical presence there, but we still do too much business there online.


It seems like Shopify only lets you add 1 zip code at a time, which is a nightmare considering there are 2,597 of them.


Surely there's a way around this? Any help would be appreciated, thanks!