[Editor's note: We've updated this story, which originally appeared in January 2008, to reflect current returns and other policies.]
Illustration: Hal MayforthAn HDTV is not a sweater--a fact that retailers will make very clear if you try to return your new flat screen. If the digital cameras (or other tech gifts) you got from your mom, your cousin, or your best friend this holiday season must head back to the store, you need to be prepared before you get there.















