This is a new comment for the thread http://www.zen-cart.com/showthread.p...reight+collect.

If you are using storepickup shipping module as a freight collect module, an additional change must be made with version 1.5.3, which seems to always calculate sales tax anytime the storepickup shipping option is selected.

In includes/classes/orders.php around line 462, rem out the 8 lines or so that deal with taxation and the storepickup option.

Probably not many people using this, but thought I'd share my fix if anyone could use it.