Oh, I had a nice response whipped up for Archie, but they're just trying to help so I deleted it.

You can add in sales tax rates by item, location or customer I think. We used to do this back before a few states contacted us and opened our eyes to the liability. It's impossible to do correctly without some sort of software help now. 13,000+ tax jurisdictions, along with tax holidays and special rates for some products (no tax on work boots in NJ I hear?) Either you're small enough to squeak by for now, or you're gonna get slapped with a fine in the near future. Avalara is just so big and integral now that they don't care.