CustomBooks,
If you are taxing purely based on the ship to zip code than you will not have to use zone definitions or zen cart zone taxes at all.

So you would have your countries set up (with USA and any other countries you ship to). Then you would have your states set up as zones, including Nevada (just Nevada not counties).
You do not need to set up anything else as far as zone definitions or zen cart tax rates (you do however need tax classes set up!).

All the sales taxes will be handled by the Local Sales Tax Mod.
So set up each tax rate with all corresponding zip codes exactly as you described.

Tax Zone=Nevada
Apply To=postcode
Look For=89701-89703;89706;89711-89714;89721;
Tax Rate=7.4750
Tax Description=Carson
Tax Shipping=true
Tax Class=Taxable Goods


LadyHLG