Ok, I cannot believe that I didn't find this until just now. I hacked one of the New York tax modes, and 1.3.7 broke it. I have not had time to fix it. This mod seems to be the nearly ideal solution.
I installed it (but have not configured it yet) and have but one suggestion. I saw an implementation of zip code tax in a paid solution that I really liked.
The use of a mask on the zip code so that you don't have to enter each and every zip code is an interesting option.
i.e. 895* would be used for all zip codes that start with 895.
I will let you know how the configuration goes later this week.
Thanks for the great work on this. The complete use of the override system witno core overwrites is FANTASTIC!


as you can see, this is what I saw in my checkout.


