> It would be impossible to show the prices with sales tax when there are 50 different states with differing sales tax laws Heck, the state level sales tax rat

> It would be impossible to show the prices with sales tax when there are 50 different states with differing sales tax laws Heck, the state level sales tax rates are even the easy part. Within states there are counties which often levy additional sales tax, and then cities within the counties do it as well. These county and municipal tax rates are additionally often comprised of a variety of "temporary assessments" which appear and expire seemingly at random. Knowing which rate is charged at a given location devolves into a very difficult problem once you realize there's no centralized address-to-jurisdiction database, nor a centralized jurisdiction-to-tax-rate database.