We only charge sales tax on orders shipping to California and Illinois, so if you're shipping to an Arizona address, you will not be charged sales tax.
I just tried our shipping link and didn't have any problems loading it, so I'm sorry you're having difficulty accessing it. We offer a wide variety of shipping options, and rates will vary depending on the size and quantity of books in your order. For an 8x8 Classic book, Economy Ground shipping is $7.99. For an 11x14 or 12x12 Classic book, Economy Ground shipping is $9.99. For two 8.5x11 Classic books via Economy Ground, the first book is $8.99, and the second book in the same order is $3.49.
If the link you're clicking is the above link in the fine print, it may help to try one that is not being redirected through Groupon - in that case, please click here.
Hope this helps!
Nov 25, 2012