Not selling internationally perhaps? If you're only selling to customers in the same place then taxes are often much simpler. You might even be exempt from your country's whole sales tax system until you're big enough to cross a threshold.

I'm referring to the international sales. We only sell within the US, state taxes are relatively easy

You must have quite the setup to calculate state, county, and local taxes.

Most online sellers don't have to handle that themselves, whether they're selling physical goods (your shopping cart like Shopify or WooCommerce will do all the sales tax calculations), or services (most locales don't tax them, and you have to get pretty big to worry about establishing economic nexus in places that do).