The best way to get permanent marker stains out of upholstered furniture is to use a solution of dishwashing soap, white vinegar and water to pretreat the stain, according to Good Housekeeping. Mix 1 tablespoon of dishwashing soap with 1 tablespoon of white vinegar and 2 cups of water. Apply the solution to the stain, and allow it to soak for at least 30 minutes. Then, flush with cold water.
If the stain does not go away following the pretreatment, try mixing 1 teaspoon of dishwashing soap with 1 tablespoon of ammonia, and add the mixture to 2 cups of cold water. Let the solution soak into the stain for 30 minutes. Then, use a clean cloth to blot the stain every five minutes with additional solution. Rinse with cold water, and use a dry cloth to blot.
For wood furniture that is not upholstered, Lifehacker suggests using a small amount of isopropyl alcohol to remove the ink residue. Before using isopropyl alcohol, always test it on a small area of the furniture that is not readily visible before using it to remove a stain in a visible area to make sure that it does not damage the surface. Lifehacker also suggests using Goof Off or toothpaste to remove stains, or use a power sander as a last resort for difficult stains.