ASK HN: Best way to calculate sales tax for ecommerce
What are the best tools out there for an ecommerce site/cart (fully custom, not magento or anything like that) to estimate and report sales tax for its customers? We've been looking at things like zip2tax which would give us tables to download and store internally, but curious what others have done that worked well? I imagine with these tables we'll just check the city/zip code and then based on some rules lookup the percent tax that should be charged. Seems straightforward enough, but I'm not sure it helps us report all the right stuff to the IRS at the end of each quarter. Any tips?
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