Customs and Duties
You're always allowed to bring goods of a certain value back home without having to pay any duty or import tax. But there's a limit on the amount of tobacco and liquor you can bring back duty-free, and some countries have separate limits for perfumes; for exact figures, check with your customs department. The values of so-called "duty-free" goods are included in these amounts. When you shop abroad, save all your receipts, as customs inspectors may ask to see them as well as the items you purchased. If the total value of your goods is more than the duty-free limit, you'll have to pay a tax (most often a flat percentage) on the value of everything beyond that limit.
Visitors may enter Guatemala duty-free with a camera, up to six rolls of film, any clothes and articles needed while traveling, 500 grams of tobacco, 3 liters of alcoholic beverages, 2 bottles of perfume, and 2 kg of candy. Unless you bring in a lot of merchandise, customs officers probably won't even check your luggage, although a laptop may attract some attention.
It's illegal to export most Mayan artifacts. If you plan on buying such goods, do so only at reputable stores, and keep the receipt. You may not take fruits or vegetables out of Guatemala.
U.S. Customs and Border Protection. www.cbp.gov.