You are absolutely correct. I believe this is another major difference between ProConnect and Lacerte. Lacerte has an ability to set up many Options, including local sales tax rate. That is useful when the major of clients are in the same table area. Where I live, even that does not really work and I need to go in and set the rate EVERY YEAR for EVERY CLIENT, which is what you need to do in ProConnect IF sales tax is really an item that affects the return. 

Ideally the software would take care of this via the zip code of the client, but since more taxpayers would use state tax over sales tax, the likelihood of that being implement is probably slim to none.