Why is my WooCommerce store charging tax incorrectly or not showing shipping rates at checkout?

Mismatched WooCommerce calculations occur when geolocation settings fail to read the customer IP, when tax database tables are misconfigured, or when conflicting shipping class variables override rules.

“In almost every case I’ve dealt with, it’s a geolocation setting misreading the customer’s location, or a tax table that’s slightly out of sync. I’ll get your rates calculating correctly within 24 hours for $99.”
— Jeff Bollettino, Managing Director, Ignite Conversions