A very good explanation from http://dowlohnesprice.blogspot.com/ on the sales tax issues involving these deals that companies like Groupon and Living Social are offering. The article particularly addresses MA and NY, but can be helpful in understanding the issues in any state.
And for some background, here's an article from 2009 on good old-fashioned coupons.
The Sales Tax Guy
See the disclaimer - this is for education only. Research these issues thoroughly before making decisions. Remember: there are details we haven't discussed, and every state is different. Here's more information
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