Sales and Use taxes will become more important as the states look for new revenue in economic tough times. If you are using a software product to calculate sales tax, your risk is far lower. Some of the key products that do sales tax calculations are: Avalara AvaTax, CCH Sales Tax and SpeedTax. These products can be used with products from the low end market such as QuickBooks through the mid-market accounting software products. There are high end vendors such as Versatax and Sabrix and other vendors in this space as well. Most of these vendors either have, or will introduce, a Use Tax product this year.