Liquor such as whisky, Scotch and vodka are distilled, and
already aged, so they should not deteriorate like wine or beer.
Store the liquor in a coll dark place and it should keep
indefinitely.
Quality liquor can last a very long time. Scotch and bourbon can
improve with age. Cheaper alcohols will break down over time and
lose their taste. I would give five to ten years for most hard
liquors. Longer for the higher quality ones.
