ColdFusion question - calculating sales tax

I am using Cartweaver shopping cart for ColdFusion.  Cartweaver does not have an option for the below question as far as I can tell, so I'm wondering how i can get this done with custom code.  (I'm *slightly* under pressure!!)
 
The company I work for is in Texas.  I just found out (with 99% of the website done) that we don't charge a flat Texas sales tax.  Normally, if you are in Texas and buy something in Texas, you are charged the flat Texas sales tax.
 
My company bases it's sales tax on the final destination of the product.  We have 5 warehouses in 5 different states.  If an item is being *shipped* to anyone living in one of those 5 states (even if someone out of state purchased it), the purchaser's tax is based on the local rates in that state.
 
Our warehouses are located in New Jersey, Texas, California, Nevada, and Tennessee.  So if someone in Oklahoma buys an item but has it shipped to New Jersey, he/she will be charged the New Jersey tax.  If they live in Oklahoma and the item is shipped to Oklahoma, there is no sales tax.
 
Question 1:  is there a way to code tax based on the shipping address (or zip code maybe?)
Question 2:  California (and I think Nevada) charge city tax instead of state, which means I'd need to enter 100s of different tax percentages for that.  I assume if I can find the code, I can just modify the percentage rate.

Anyone?

Thank you!!!

texastwostep
texastwostepAsked:
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mmc98dl1Connect With a Mentor Commented:
1: of course
2: correct

So you could do one of 2 things, store a database table with the zip and percentage next to it, then do a lookup on the table against the database. I would recommend this but dont have time to do a smaple.

Or an array of the same thing.

<cfset zipTax = ArrayNew(2)>
<cfset zipTax[1][1] = 2000><!--- postcode --->
<cfset zipTax[1][2] = 10><!--- percentage --->
<cfset zipTax[2][1] = 2001>
<cfset zipTax[2][2] = 11>
<cfset zipTax[3][1] = 2002>
<cfset zipTax[3][2] = 12>
<cfset zipTax[4][1] = 2003>
<cfset zipTax[4][2] = 13>

<cfset url.userZipCode = 2000>
<cfloop from="0" to="#arrayLen(zipTax)#" index="i">
<cfif zipTax[i][1] eq url.userZipCode>
<cfset taxPercentage = zipTax[i][2]>
</cfif>
</cfloop>

you will have a var called taxPercentage with the correct rate in it.

The theory is the same with a query except you do

<cfquery name="getTaxRates">
Select taxRate, zipCode
FROM taxrates
</cfquery>

<cfloop query="getTaxRates" index="i">
<cfif getTaxRates.zipcode eq url.userZipCode>
<cfset taxPercentage = zipTax.taxRate
</cfif>

HTH
</cfloop>
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texastwostepAuthor Commented:
1. i thank you
2. i really, really, really thank you alot!

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mmc98dl1Commented:
not a problem - glad this helps.
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