As of this writing, Alaska, Delaware, Montana, New Hampshire and Oregon are the only five states that do not impose a sales tax. It isn’t necessary for you to be a resident of one of these states to shop there. In fact, doing some tax-free shopping in one of these states can save you money on your tax return if you itemize your deductions and take the state sales tax deduction. If you do this, you can’t deduct your state income tax payments too – you have to choose one or the other. The best part is that you can use the Internal Revenue Service optional sales tax tables to figure out how much your deduction will be.